Photoshop CC: Not seeing finder thumbnails on MacOS (MacOS issue)

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  • (Edited)
I have been using photoshop CS6 until now. I have installed photoshop CC and its seems that image preview icons are not working.

With Photoshop CS6 every time i used to save images, it used to save an icon preview for the finder on mac. However, with new CS6 its in not saving the icons anymore. I have double checked the preferences-file handling- image previews- always save- both icon and windows thumbnails are ticked but they are not working.

Any solution to fix this?
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Umair Riaz

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  • frustrated

Posted 6 years ago

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Chris Cox

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Photoshop CC is no longer saving resource fork thumbnails (because newer versions of MacOS are having problems reading them). But Photoshop is still including a thumbnail / preview inside the file.

MacOS sometimes reads the thumbnail/preview, and sometimes reads the flattened composite image. But it sounds like the OS may have more bugs than just failing to read resource fork thumbnails correctly.
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Umair Riaz

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Is there any fix to this problem? I have reinstalled photoshop CS6 and found the thumbnails to be generating and showing normally. I am testing the same jpeg file side by side on Photoshop CC and it is not generating any previews.

So does that mean, to see the thumbnails i have to carry on working Photoshop CS6 and uninstall CC since it is no longer doing what an older version is?
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Chris Cox

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We don't know why Apple's OS thumbnail code sometimes works and sometimes does not. We thought it was due to bugs in their resource fork thumbnail extraction - but it sounds like they have other problems (which adds evidence that the OS bug is in their metadata handling, not thumbnails directly).

The problem is in the OS, not the application itself.

Previously, some users have had luck using utilities to remove the .DS_Store file in each affected folder, while others have resinstalled the OS and gotten thumbnails working again.
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Umair Riaz

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I have reinstalled a fresh copy of ML and first thing i have done is installed photoshop CC with all the updates. Guess what!!! No icons...

I have tried everything in my mind but it is a failure. Damm apple!!!

I know its not the right place to ask but is there any other app which can generate image previews for me. I am quite happy to work on photoshop CC but i need to have image previews of my photo collection. Please anyone help me on this.
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Chris Cox

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In the Finder: View->Show View Options and make sure "Show Icon Preview" is on.
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Roxanne Guilhamet

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Hi Chris,

I have the same problem. And in my Finder: View->Show View Options does have "Show Icon Preview" on.

Once PS CC has turned an image thumbnail into a generic blue PS, when I open that image with PS CS6 and just "Save" nothing happens. But if I save the same file again with "Save As" and give it a different name, I get the image thumbnail again. This isn't a fix, or even a good work-around, long-term. But it's the same Finder in both cases.
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Chris Cox

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That just sounds like you're hitting the same old MacOS "sometimes we show a thumbnail and sometimes we don't" bugs. A few users have said that it is working much better in MacOS 10.9, but 10.9 has other issues so you may not want to rush into upgrading.
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Jen Moody

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Old problem, but just in case -- this just worked for me. Deleting the com.apple.finder.plist and then relaunching the finder fixed it. Here's the link I used http://www.jgoode.com/easy-fix-for-mac-finder-preview-thumbnails-not-displaying/#respond
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C Clavo

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Thank you Jen Moody! I know you sent this reply two years ago, nevertheless it helped fix my problem with Preview. I now can quick look .PSD files again. 
(Edited)
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graeme

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This bug is really gonna effect a lot of pro users. A lot of our files are .psb and the ability to visually reference them from within the finder is key to face paced production environments.
After beginning the process of moving all our retouchers over to Photoshop CC, we will have to stick with CS6 until a fix or update from Apple is available.

Graeme
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Chris Cox

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Please let Apple know about your displeasure with their icon support changes.
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IAH1

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We have the same problem at two different companies: Many files on many different mac computers, but no more thumbnails!!! I think it came up especially since Photoshop CC. It feels like being back in the stone age. This is a urgent theme between Apple and Adobe, and not issue of customers.
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Chris Cox

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We've let Apple know that it is a problem. Again, it counts for more if Apple hears the problems from their customers.
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John R. Ellis, Champion

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Graeme, I've implemented a Quick Look plugin that provides thumbnails and previews of PSB files to the Mac Finder and open/save dialogs. You can try it for free at http://www.johnrellis.com/photoshop/p....
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Gary Tang

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if you use bridge you will see all the preview. I think adobe trying to make people use bridge.
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Chris Cox

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Nobody is trying to make people use Bridge.
This is just a problem with thumbnailing in MacOS.
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The Wrist

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SoIution -  bring PSD file into sketchbook pro save file again as same file name & as a psd & u will get the preview, file specs remain at whatever original file was, mine was 300 DPI ...hope this helps a bit havent time to read rest of postings might already be a solution! LOL! Anyways make it a great day.
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michael clarke

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Photoshop CC is no longer saving resource fork thumbnails (because newer versions of MacOS are having problems reading them).


That's bogus. If OS X has problems displaying icons (which I have personally never witnessed, despite managing dozens of Macs running the latest operating system), then that's Apple's fault. Photoshop CC not saving icons — even though there is a Preference setting and a Save dialog checkbox theoretically giving the option of saving icons — is entirely Adobe's fault.

Please let Apple know about your displeasure with their icon support changes.


Photoshop CS3, 4, 5, and 6 all generate icons that display with no problems in OS X Mavericks 10.9.1. Photoshop CC does not. Thus, Apple is blameless, as far as I'm concerned. Please let Adobe know about my displeasure with their icon support changes.
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Chris Cox

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Yes, MacOS has serious problems displaying thumbnails - which we have discussed at length with Apple.

Photoshop CC is saving icons, in exactly the way Apple asked us to save them.
Yes, the icon saving changed because Apple asked us to change it, and because Apple deprecated the APIs formerly used.

Again, this is a MacOS issue, and you need to let Apple know about your displeasure about their OS issues.

Adobe cannot fix Apple's OS.
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graeme

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Hi again,
Yes. What is the point in Adobe just saying "complain to Apple".
If in Mavericks Photoshop CS6 is fine with icons, surely it will stop pro users moving up to Photoshop CC? Can't Adobe go back to the previous method? that works? surely is is more important to look after your customers needs rather than apple's request?

Can you imagine how many professional photoshop users are about to buy the new Mac Pro and go onto Photoshop CC in the coming months only to find out there huge psb files have no icon?
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Chris Cox

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We can't make Apple fix their bugs. We can request that they fix bugs, but it counts for more with Apple if customers are actually complaining to Apple about Apple's bugs.

We can't keep using the old resource icons, because the APIs for resources are going away, and Apple already had bugs when trying to use resource icons. We had to make the changes Apple requested.

But if you want to see icons work correctly - it would really help to let Apple know that this is a problem for you.
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Aaron Shepard

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I'm using CocoThumbX to add icons to Photoshop CC files. They're viewable in Snow Leopard even with the Finder preference off, just like Photoshop CS6 icons.

Of course, you can also use Bridge to view previews.
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Don Carmickle

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I do not think a good case has been made that it is Apple's "bug".
Despite comments that the OS has bugs, who has ever complained that the OS has not been able to read the thumbnails on any version of Photoshop except CC? And Apple did not write Photoshop CC.
I do not accept the premise that "they made us do it that way". If Apple told you to remove the paint brush, would you do it? I think not. Saying that Adobe removing a feature from their software is somehow Apple's fault has not been backed up.

Now perhaps if it had been said that in future releases then none of the old icons will be visible, and only the new thumbnails will work, then an argument could be made for making the change. But in reviewing all the comments, that has not been posited.
Or perhaps that a future release of the Apple OS will show the correct thumbnails instead of the generic PSD icon, then okay, I could buy that. But that has not been said.
It has been said that ADOBE is not saving the icons in the resource fork any more. If they were there, as they were in all previous releases, then I would be able to see them on my OS.

Adobe is suggesting that we complain to Apple about this. But I ask: Has anyone at Adobe actually heard the response from Apple when this type of complaint is attempted? I really believe that Adobe would not suggest such a waste of time nor an opportunity for Apple to heap blame on a developer if they knew the response.

I purchased Photoshop CC, but I have uninstalled it. I have gone back to CS6 and I am very happy. However, I am concerned that this issue is not going to be resolved in future Photoshop releases if Adobe continues to deflect blame elsewhere.
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Chris Cox

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Please read the previous postings: Photoshop is following Apple's instructions, and this can only be Apple's bug. This cannot be addressed by Photoshop, and can only be solved through fixes to Apple's preview/thumbnail code.
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Benedikt Zwölfer

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How many years did both companies schedule, until this serious problem will be solved??
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Chris Cox

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We don't know Apple's schedule. But the more they hear about the problem from customers, the higher it moves on their priority list.
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Benedikt Zwölfer

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Absolutely correct! Years pass by and nothing happens at Adobe, there must be found an alternative techique. Unbearable circumstances.
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Chris Cox

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Um, nothing can happen at Adobe - we cannot fix bugs in Apple's code.
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Benedikt Zwölfer

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If CS6 runs with finder icons, why not add the same old "feature" to Photohsop CC in exactly the same way? If Adobe was able to programm CS6 compatible with the current "buggy" Apple finder, so why don't you take still the same solution for photohsop CC?
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Chris Cox

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Because MacOS has bugs with resources (that caused even more thumbnail problems), and because the resource APIs are deprecated (aka: going away). AGAIN, we are following Apple's instructions, and encountering bugs in Apple's code that only Apple can fix.
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Aaron Shepard

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If Photoshop developers have a choice between saving icons in a way that is prescribed but does NOT work, or else a way that is deprecated but DOES work....

Why not do it BOTH ways, for now? Would it really hurt anything to save TWO thumbnails to the file?
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Chris Cox

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Please read the previous comments before adding irrelevant and redundant suggestions.

AGAIN, the deprecated way ALSO HAS PROBLEMS - it just fails to work slightly differently and causes MORE KNOWN PROBLEMS.

We're already doing what we can, the rest is up to Apple to fix.
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Aaron Shepard

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Sorry, didn't mean to cause aggravation.
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David R. Purnell

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@Chris Cox, et al.,
Saying this is a Mac OS problem (instead of an Adobe problem) doesn't seem to follow . . . because . . .
I'm not running Mac OS Mavericks; I'm running OS Lion (10.7.5) and Adobe Ps CC. And I'm having the same issue with image files being saved with no thumbnail.

I opened an old jpg file (thumbnail is present) with Ps CC, and saved the file as a PNG. There is no thumbnail, even though in the Ps prefs (File Handling > File Saving Options) "Image Previews" is "Always Save" and both "Icon" and "Windows Thumbnail" are ticked.

My reasoning might be faulty. What do you think?
==================
Ha! Here's an update:
The newly saved PNG file I mentioned above, I just noticed, has a Finder image thumbnail when in List view [and in Columns and Cover Flow (I'm running OS Lion 10.7.5)], but has no Finder image thumbnail when in Icon view. And it is in Icon view that having a thumbnail is most valuable. :–(
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Chris Cox

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The problem has existed for several versions of MacOS.

And yes, from all the evidence, this is a set of MacOS bugs.
Sometimes it can be due to your OS preferences, but there are other problems that can cause thumbnails not to show even when your preferences say they should - and it is not consistent.
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David R. Purnell

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Hmm. OK, thanks. Chris, I appreciate your input and opinion.
FYI, in running Mac OS X 10.7.5 (Lion), I went from using Ps CS4 to Ps CC; no versions in-between. I had no problems with thumbnails in Ps CS4.
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David R. Purnell

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I THINK I'VE FOUND THE SOLUTION to the thumbnails not displaying in Finder windows (in Icon view)!!!

This worked for me (running OS 10.7.5 Lion). See if it works in newer versions of the OS:

With an open Finder window that contains image files whose Thumbnails don't display, go to Finder's Main Menu > View > Show View Options. In my "View Options" window, I found that "Show icon preview" was NOT ticked.
I ticked it . . . and . . . VOILÀ . . . the missing Thumbnails DISPLAYED!

Give it a try, everyone . . . and report back.
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Chris Cox

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That is the user preference issue I mentioned. There are additional problems where thumbnails sometimes don't show even if that setting is enabled.
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David R. Purnell

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Oh.
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Marcus Reese

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What fixed the problem for me was to save the Photoshop CC files with Maximize Compatibility turned on when saving the file. Doesn't matter if running Mac OS 10.7 or 10.9.
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KenJyi Yos

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So apple asked for this new thumbnail procedure and its not working, 's it possible to update PS CC to have both the new and old thumbnail protocol so we can simply go in and select old (pre-apple fix) and then select new thumbnail protocol later (post apple fix). I mean the code exists for both, why not just give an option for it to work?
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John R. Ellis, Champion

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Here is a detailed proposal for how Adobe can provide thumbnails and previews for the OS X Finder and open/save dialogs, at low engineering cost:

http://feedback.photoshop.com/photosh...
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GG

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I have this problem since recent Mavericks update from Lion 10.7.5 and using Pshop CC 2014 on some new and revised images. Changes to OS and Pshop (previously CS5.1) were concurrent so didn't know who to blame.
Here's my experience: ("preview" = "image thumbnail")
All pre-CC Pshop images retain their previews in List View. Previews of Pshop CC images are visible in Icon View, Column View and Cover Flow, just not in List view. Also not at top of "GetInfo" window.
So the previews are being generated, but are not available in List view. This does seem to indicate it is an OS-related problem.
My solution: use Pshop 5.1. (Or if I have to: use Icon View – ugh!) What a PITA.
Sometimes "new" technology really slows us down.
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John R. Ellis, Champion

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GG, I've noticed that List View in the Finder sometimes seems to get stuck and doesn't generate thumbnails for a folder. Try copy and pasting this command line to the Terminal:

qlmanage -r; qlmanage -r cache; killall Finder

This will clear the Finder / QuickLook cache and cause thumbnails to get regenerated.
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Benedikt Zwölfer

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Anyway: ADOBE has to bring a solution to its customers! We are talking about ADOBE Photoshop, not about APPLE Photoshop.
If the environment changes, you need to assimilate – even if you are not happy with the Apple environment. Everything else is only to bluff it out.
Please don't invent excuses for Adobe! It's an insolence just to put here a blog for discontented professionals OVER YEARS, who pay a lot of money every month and not to care a fig about it. It doesn't change anything if an administrator writes here down sometimes some appeasements.
It is not our duty to bring solutions, we are CUSTOMERS.
What a sad bad attitude is this from Adobe.
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Chris Cox

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Adobe can do very little to change the behavior of Apple's OS.

All we're doing is relaying the facts of changes in Apple's OS.

We've been working with Apple to that OS bug that sometimes prevents icons/thumbnails/previews from appearing, but we still cannot reproduce it as easily as Apple needs to continue their investigation.
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graeme

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Look, just buy this for $9.95 and it solves the problem.
http://www.johnrellis.com/photoshop/p...

I own a retouching company in London and this has solved the problem, allowing all my retouchers to finally work in Photoshop CC. We were staying with Photoshop CS6 until then.

I am surprised there is not more mentions of this problem ALL over the web and industry. Surely there must be thousands of users with this issue?
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Chris Cox

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Please read the topic to see that there are multiple issues being discussed here: Apple Finder bugs, Apple metadata bugs, Apple changes in APIs (and Adobe agreeing to make the changes Apple requested), and lack of PSB support in Apple's QuickLook code.
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John R. Ellis, Champion

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I just encountered a bug in Photoshop CC 2014 that may be confusing people trying to get the OS X Finder to display large thumbnails and previews. If a file was saved without a merged compatibility layer (Maximize Compatibility turned off), if you then turn the option on and do File > Save again, the file still won't have the compatibility layer. And thus the OS X Finder / Quick Look won't be able to display large thumbnails or previews.

The only way I've found to get a compatibility layer saved in such a file is to turn on Maximize Compatibility and then do File > Save As.

See http://feedback.photoshop.com/photosh... .
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Marc Garnier

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Is there a solution for this unbelievable crappy issue?? I'm still facing this problem.
I cannot believe my eyes when I read this post... Shame on the software industry, it is pathetic...
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John R. Ellis, Champion

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There are a number of different causes of the Finder not showing thumbnails for PSD/PSB files. If you provide more detail, including version of OS X and a screenshot, we might be able to resolve your issue.
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Marc Garnier

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Hi John,
I'm working on Mac OS 10.10.4 (14E46) and Photoshop CC 2015 latest update.
Preview is enabled on Finder side.
To have a chance to get a thumbnail and preview I must open the original document then "save as". Please check screenshots attached.
The jpeg thumbnail is ok, the psd "copy" is ok but the original file is not ok.

This trick doesn't work each time and cost so much time... this is not reliable solution in my opinion.


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Chris Cox

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That looks like the OS did generate a thumbnail, but you had maximize compatibility turned off, so the thumbnail is solid white.
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Marc Garnier

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I'd like you to be right but sorry, I dig into this long time a ago. I always turn on
"maximize compatibility"
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Chris Cox

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Then the only remaining possibility would be an OS bug.

But in this case, it really does look like you saved without maximize compatibility.
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Marc Garnier

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Is there a way to force "maximize compatibility" once and for all? I mean somewhere in PS preferences instead of having to select this in a popup window while saving a document ?
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Chris Cox

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No, there isn't. Unfortunately it is remembered on a per-file basis. But I made sure that in CC 2015 you could change the state if you do a SaveAs.
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Marc Garnier

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yes, with a SaveAs it does the job. This is how I bypass the issue but I have to do it for each file. It takes time, sometimes it doesn't work and it's a bad workaround for such a simple thing as generating a thumbnail...
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Chris Cox

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Marc - the problem is that someone said "don't save this file with max compatibility" at some point. The only way to change that is to resave the file with max compatibility on. Otherwise the OS has no idea how to create a thumbnail for the file (because the OS doesn't have all of Photoshop available to read the document).
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John R. Ellis, Champion

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Marc, as you've discovered, once you've changed the Maximize Compatibility setting, you need to do a File > Save As -- doing a File > Save won't have any effect. Please add your vote and opinion to this problem report: http://feedback.photoshop.com/photosh...
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Marc Garnier

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For sure it's related to this problem report but I swear, I always turn on "Maximize compatibility" when the popup window appear while saving a file, even for the first time it's saved.... I just had a look to Preference > Image Previews. It's set to "Always Save"... so I don't understand why sometime I don't have any preview. It makes me crazy and right now I cannot reproduce it =(
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Marc Garnier

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but I managed to reproduce the problem report you mentioned
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John R. Ellis, Champion

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You wrote: "I always turn on Maximize Compatibility when the popup window appear". If you set Maximize PSD And PSB Compatibility to Always, then you won't ever be asked again.

Some more thoughts: The Finder/Quick Look has a bug where it will sometimes generate a generic icon (not a white thumbnail) for PSDs/PSBs. This tends to happen when you have many of them in a folder and the disk or network gets slowed down for some reason. Perhaps you've also encountered this? If you see a generic PSD icon, it's this bug, but if you see a white thumbnail, it's the issue with Maximize Compatibility.

Even when a file is saved without Maximize Compatibility, you can can still see its thumbnail in the Finder if you set the Finder's icon size to less than about 190 x 190 (via View > View Options). At the smallest icon sizes, the Finder uses the JPEG thumbnail also stored in the PSD/PSB. Using a very small thumbnail size and then slowly increasing it is a way to work around the generic-icon bug as well.
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Marc Garnier

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thanks for your explanation. By the way, "You wrote: "If you set Maximize PSD And PSB Compatibility to Always, then you won't ever be asked again. " That's not true. You have to tell PS to not ask you again this question by ticking a checkbox in the popup window that appear when saving a document. Here is a printscreen.
http://snag.gy/ZzMwL.jpg
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Marc Garnier

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or here (just discovered now) : http://snag.gy/wBe8D.jpg
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Marc Garnier

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Sorry, I was not clear enough. Let me rephrase and summarise : I always tick "Maximize compatibility" when the popup appears when saving a doc. In PS preference pane, only "Preference > File handling > Image Previews" is set to Always. "Preference > File handling > Maximize Compatibility" was set to "ask". Until now I didn't know this setting. I'll try to set force all relevant settings to always and see if the issue still occurs. Thanks for your explanations.
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Julie Hopkins

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This entire stream just sounds like the Blame game. Every post I find is Apple blaming Adobe and vice versa. Get your crap together, join up and get the problem fixed.

The only reason there isn't more people posting about the issue is because the response from the "Staff" and "Experts" basically saying that the consumer is SOL. 

Please just fix the problem here...we are desperate
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Chris Cox

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Adobe can't do much to fix the MacOS bugs that sometimes (for unknown reasons) cause the OS to fail to draw file thumbnails.  We've notified Apple of the bug, but we can't go in and fix their code for them..

I don't see how Apple could blame Adobe for a failure of Apple's OS.
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Tom Keltb

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Exactly you don't see, thats the problem! The consumer does not care, and should not care, who's to blame. Just solve the issue and stop with excuses. Adobe sound like start-up company. Im paying for a photoshop subscription and yet years later I am still forced to use Photoshop 6 because of this issue. 
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Jeffrey Keating

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how can i go back to using photoshop 6 on windows 10  it wont execpt my old program disks  ?
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Kaal Dewar

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I open the same file in CS6 and CC but when I saved in CC then opened it again the file top info line has a generic icon (See attached image), unlike the CS6 one which has a preview! All "File Saving Options" in preview are ticked and Always! Desktop preview works alias of it doesn't. Looks like Adobe not Apple problem!
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John R. Ellis, Champion

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"I open the same file in CS6 and CC but when I saved in CC then opened it again the file top info line has a generic icon (See attached image), unlike the CS6 one which has a preview!"

PS CC 2017 shows the generic icon in the window's title bar for all file types, not  just PSD:



This is unrelated to whether the Finder displays thumbnails (small previews) or generic icons for PSD files.
(Edited)
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Lawrence McFarland

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Hey Adobe will you please fix this problem? If is works in PS6 then you have done something to make it not work in PS CC. What are we paying you for anyway. This is not an Apple problem it is an Adobe PS CC problem. I need mu Thumbnail images.
(Edited)
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John R. Ellis, Champion

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Lawrence wrote, "Hey Adobe will you please fix this problem? If is works in PS6 then you have done something to make it not work in PS CC."

Have you verified that your files are being saved with the options Preferences > File Handling > Image Previews: Always Save, Thumbnail checked, and Maximize PSD and PSB File Compatibility: Always? When files are saved with those options, Finder usually shows their thumbnails correctly.  (Finder can sometimes choke on folders containing many very large PSDs or on folders stored on slow external or network drives.)

Note there is a long-standard PS bug, where you can't change the compatibility option of an existing file.  Instead, you need to change the option in Preferences and then do File > Save As.
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Jeremy Clarkson

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This is an ongoing issue going back many years now, probably as many as eight years. And it's truly  ridiculous. slowing down the workflow of retouchers and imaging professionals the world over. And it seems to be all to do with the Apple and Adobe relationship having soured.
 
• Older files, which were saved using older versions Photoshop, the current Mac OS is still capable of showing their thumbnails. sometimes termed "icons". 
• With newer Photoshop files (PSB and PSD) - the Mac OS struggles to generate its own thumbnails. 

It's an incredibly frustrating and time-wasting issue. Basically the Mac OS stopped behaving efficiently with large Photoshop files a long time ago.   

You can see who's responsible immediately by toggling "show icon preview" in view options (Command J) for a folder. If you toggle this on and off, you can see the Mac OS struggling to REGENERATE the file icons, each time you do it. So these file icons are not saved permanently as part of the file anymore. They are needing to be regenerated, and each time the Finder struggles. This is utterly ridiculous, and frankly inexcusable on the part of Apple.  


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John R. Ellis, Champion

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Both Adobe and Apple are equally to blame here.  Years ago, Photoshop used to store a large-resolution preview JPEG in PSDs and PSBs.  Apple then deprecated how those previews were being stored in old-fashioned "resource forks" and told app developers they couldn't rely on that anymore.  Reasonable enough.

So Adobe started storing preview thumbnails in industry-standard metadata fields in the PSD/PSBs. But those stored thumbnails are tiny -- just 160 x 160.  So Finder is fast at showing small thumbnails, since it reads the ones that Photoshop has stored. But when you set the Finder icon size to much larger than 160 x 160, Finder / Quick Look has to read the entire compatibility layer of PSDs / PSBs to generate a thumbnail or preview, which isn't very fast for large images. (Quick Look caches the generated thumbnails, so they only get generated once.)

On top of this problem, Quick Look will give up trying to generate a preview or thumbnail after about 20 seconds or so.  And once it gives up, it won't try again. While 20 seconds seems like a lot, if you use Finder to view a folder with a large number of large PSDs / PSBs, the 20 seconds "time out" is often reached, especially if the PSDs are stored on network drives or slow external disks. Quick Look could have been better engineered to handle this situation.

Adobe could make a big improvement at low cost simply by storing a high-resolution JPEG preview in the PSDs, e.g. 2000 pixels wide (like it used to do years ago).  Quick Look would then read that preview very quickly and Finder would be able to show thumbnails and previews near-instantaneously. (I've tested this out with Finder.)

See my detailed engineering proposal here: 
https://feedback.photoshop.com/photoshop_family/topics/providing-psb-psd-thumbnails-and-previews-for... 
Be sure to click Vote in the upper-right corner to make it a tiny bit more likely Adobe might consider it befor the next ice age.

Meanwhile, if you have very large PSDs and PSBs (hundreds of megabyte or larger), my PSB Quick Look plugin can help Finder show thumbnails and previews much faster, for both PSDs and PSBs.   The mediocre Quick Look implementation by Apple still causes problems with slow drives, but not nearly as much as using the built-in Quick Look PSD generator.
(Edited)
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Jeremy Clarkson

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Right, Thanks for your explanation and makes a little more sense now. I’m not entirely sure the problem has anything to do with Adobe though. 


  1. Why should adobe  be forced to increase the file size, if even by a small amount.?
  2. Why should Adobe be forced to do this, when they’ve seemingly done everything in their power to provide every kind of thumbnail that Apple have asked for, and it’s Apple that removed the abitilty to self-generate high quality “resource fork” thumbnails? 
  3. Surely it’s completely illogical, for the operating system itself (Quick Look if you prefer) to have to struggle away generating file thumbnails and seemingly to have to burrow into the file structure to retrieve these thumbnails. This cannot make any sense. And is obviously the result of some ludicrous ‘stand-off’ between Apple and Adobe. 
  4. It doesn’t just struggle on old slower drives. This is happening right now. Running on very latest OS (Mojave), on a solid state “fusion” drive. So these preview-less files are being stored now in 2019, on the fastest possible local drive, latest version of Photoshop, latest OS. The mac OS generated thumbnails are either incorrectly generated, (alpha masking gaps, or seemingly corrupt) or not generated at all. This is utterly ridiculous so many years since these irretrievably dumb changes to the macOS were made. It should land back in aided side of the net to sort this problem when they didn't create it.   
  5. It seems like the macOS is struggling with large files, in many other ways. By large we mean quality files of 2 - 8 GB plus. Not merely 200meg plus
  6. Without any preview, sometimes the only way to identify a  file, which has been poorly named, is to open it. Try doing this with ten 8 GB files on a Sunday night. 
  7. It’s just so SLOW to watch it chugging away in the background, spinning wheel. When Mac OS Leopard (2007) was able to display any Photoshop file, regardless of size, with elegant  efficiency. 
  8. There is absolutely no way to get the operating system to generate correct thumbnails. Trying to batch generate them yourself? Nope, nothing works. 
  9. The previews don’t need to be “higher resolution“, they just need to exist. The reason this is so vastly important is that imaging files, by their nature, need to be visually recognisable immediately. Even if the icon is 100 pixels square, and imprinted with a ’78 Apple logo, it needs to exist. 
  10. Previews wouldn’t need to be anywhere near as large as 2000 x 1333 pixels. That’s huge, and by its very nature would create efficiency problems and overhead, quite obviously 
  11. No one cares how they are generated, they just need to be stored or cached by the operating system, and instantly retrieved when displaying the file in the finder. In the immediately most logical way and optimal way. Like it always used to be. The intricacies over how this is done, don’t matter too much. 

Please!! Honestly it’s another issue to add to the increasing list of black marks against Apple. What’s to stop people switching their entire studio across to cheaper Windows workstations with essential stuff like this happening for so long. Sigh ;-)



(Edited)