Lightroom Classic: GPU Issue on Mac Pro

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  • Updated 3 months ago
  • (Edited)
I've noticed that in LR 9.2.1 on a 2019 Mac Pro running an AMD Radeon Pro 580x when I go to Preferences > Performance and change 'Use Graphics Processor' to either 'Auto' or 'Custom' the develop module shows massively oversaturated colours.
However, as soon as I turn it to 'Off', I get what are normal colours.
According to Live Chat support it's a bug due to the GPU being untested with Lightroom and his suggestion was to file the report here.
Any ideas on how I can resolve this or is it just a case of waiting for Adobe to fix the bug?
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Mark Hewitson

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Posted 3 months ago

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John R. Ellis, Champion

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Your 2019 Mac Pro with that graphics chipset is supported:
https://helpx.adobe.com/lightroom-classic/kb/lightroom-gpu-faq.html

Don't waste any further time with Adobe support -- they often say pretty much anything when they don't know the answer so they can mark the issue as successfully closed.

Two initial troubleshooting steps:

1. Update to Mac OS 10.15.4.  LR pushes the limits of GPUs in ways different than other apps and often trips over bugs in the drivers, and updating is the only way to get the most recent GPU drivers on Mac. 

2. You may have a in ICC color profile assigned to your display that is corrupt or incompatible with LR.  See this article for how to quickly test that: 
http://www.lightroomqueen.com/articles-page/how-do-i-change-my-monitor-profile-to-check-whether-its-...







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Mark Hewitson

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Thanks for that.
1. I was already running 10.15.4.

2. I changed to another ICC profile and whilst the oversaturation is less, it is still there and noticable when I turn the Graphics Processing on.
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Robert Somrak, Champion

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Did you switch the the sRGB profile and try it as the article stated?
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Mark Hewitson

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Yes, I followed the instructions.
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John R. Ellis, Champion

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Good. Using the built-in sRGB profile, rather than another custom profile from a calibrator, helps identify incompatibilities in profiles built by the calibrating software.