Performance Problem with with Photoshop CC 2015 on a Retina iMac late 2015

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  • Updated 3 years ago
I updated my retouching iMacs in the studio and found that the maxed out Retina 5k iMac had serious performance issues especially when using the healing brush in combination with the space bar ( to move the image).
I do work fast but was very shocked that my 2 year older iMac ( that was also the maxed out version) is working much smoother.
The healing brush seems to crash, the moving hand wont go away or sometimes the image zooms out by itself. The fan goes on.
What seems to ease the glitch is when I turn the graphic processor settings to normal.
Photoshop itself seems a bit faster in normal calculations but almost slower in graphic redraw.
4 GHz Intel Core i7
64 GB 1867 MHz DDR3 (OWC)
Retina 5K, 27-inch, Late 2015
AMD Radeon R9 M395X 4096 MB

@ Cris Cox is this a known bug, is there anything that Photoshop can do or apple ?

All the programs are the newest versions!

Thanks in advance, Happy New Year

Andi
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Andi@redfishblack.com

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Posted 3 years ago

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Chris Cox

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We have not been able to reproduce this on our systems.

If you are getting a crash, we need to see the long, detailed crash report.

The hand tool getting stuck was a problem with an older Wacom driver.
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Andi@redfishblack.com

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Hi Cris, of course, I remember that, :)
That why I changed the driver of course.
What should I do, what do you recommend ?
Photoshop Graphic seems almost slower than on my two year older machine.
I notice this for example when I do selective color (grayscale preview) it takes quite longer to redraw the image.

Andi
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Chris Cox

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That sounds like a video driver issue, but could also be caused by things like corrupt fonts, extension panels, third party automation plugins, utility programs(antivirus, firewall, etc.), etc.
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Andi@redfishblack.com

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Thanks for the reply Chris, I appreciate it, and I agree could be anything,
It is a brand new computer with complete clean installs of all software. It is workable with the normal drawing mode in the graphic settings but far from optimal or at least what I expected with this computer hardware.
Andi
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Andi@redfishblack.com

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30 bit is on by default, could that be the problem ?
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Chris Cox

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Possibly, try turning it off and relaunching Photoshop.
The retina iMac 2015 does support 10 bit/channel display, but the driver code may have issues.