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7 Messages

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212 Points

Wed, Sep 26, 2018 4:06 PM

Solved

Lightroom Classic CC 7.5 Slow After Upgrading to macOS Mojave 10.14 on iMac Pro

After upgrading to macOS Mojave 10.14 on my iMac Pro everything within the Lightroom Classic CC (7.5) application has been slow. Moving from picture to picture takes a second, even moving from Develop to Library takes a good two seconds to process. Sliders sometimes work instantly but then will decide to take a second or two to process. Cropping is very jittery and just a nightmare to use right now. 

Everything was working fine prior to the update. Tried all of the usual troubleshooting steps (disabling graphics processor in performance, pausing lightroom sync, purging & increasing cache etc.).

Is anyone else having problems? I'm seriously thinking of going back to High Sierra. 

Responses

51 Messages

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1.7K Points

2 years ago

I just tested things out pretty well and don't see this problem.

294 Messages

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4.5K Points

2 years ago

I made the switch to Mojave as well and have realized a pretty good performance increase for Lightroom and Photoshop on my MacPro.  (The Dark Mode theme looks like crap, however, and there are subtle white borders on the bottom and left edges of the Lightroom window, even when expanded to full screen.)

I did see on MacOSRumors something about your issue with some iMac installs of Mojave and the solution seemed to be removal and rinstallationof Mojave.

7 Messages

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212 Points

Thank you! I will try a clean install. 

294 Messages

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4.5K Points

Probably the smartest option.  Make sure you have a good backup of your Sierra OS before taking the plunge.  Not sure how long your original try took; the blogs and forums are quoting about 40 mins, but mine took over 90!  (I was beginning to get concerned when the Apple progress bar went away but the screens never went totally dark or into power saving mode (from lack of input) so I had a glass of wine and waited.)

Installed beautifully.  Better then the Sierra upgrade IMHO.

Good luck!

7 Messages

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212 Points

Took less than 25 minutes for the full install. I created a new catalog with Lightroom and it seems to be working great... Faster than ever! Thanks for the suggestion, since OSX Tiger I've always just done the upgrade rather than the clean install and never had an issue.. so weird that was the problem! 

294 Messages

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4.5K Points

Great news!  Apple certainly delivered on their promises as far as performance goes.  Just be aware of reports on this forum about Lightroom crashing when switching between 'Modes' in Mojave.  I haven't seen that because I thought the Dark Mode was absolutely gastlyand quit using it after 30 seconds.

1 Message

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60 Points

I am also experiencing a significant performance reduction in Lightroom Classic following the upgrade to Mojave.  I may wait a week or so in order to find out if Adobe releases a Lightroom update addressing this problem.  If not, I will reinstall Mojave.

Adobe Administrator

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7.9K Messages

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115K Points

2 years ago

@Michael Smale

Clean Reinstall Procedure.

Close Lightroom
Restart the computer
Use the Adobe Creative Cloud App to uninstall Lightroom Classic CC
Restart the computer
Install Lightroom Classic CC via the Creative Cloud App
Restart the computer
Launch Lightroom 
Wait 5 minutes

After this, does the performance improve?

Adobe Photography Products

Quality Engineering - Customer Advocacy 

7 Messages

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212 Points

2 years ago

I tried just reinstalling Lightroom/creative cloud and it didn’t help. The only way I got it to work was by erasing the hard drive and reinstalling the entire operating system.

49 Messages

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744 Points

2 years ago

@John S -- do you still see the issue, or it is better now after OS install.

7 Messages

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212 Points

I haven’t seen any issues. Lightroom is working perfect now. Processed 250 RAW files from a 5Ds last night in Lightroom and everything worked flawlessly and the software was really fast. Night and day from my experience the other week. As Butch M pointed out up there, you can’t transfer everything from a Time Machine backup. I manually moved the files I needed from a Carbon Copy Cloner backup.