Camera Raw 9.5/Lightroom CC 2015.5/6.5: Moving sliders causes image colors to dim and brighten

  • 10
  • Problem
  • Updated 3 years ago
  • Solved
  • (Edited)
Update to latest LR: Now, moving sliders causes image colors to dim and brighten in a psychedelic way!. Not good. Makes you think video card is going.
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5WA - Robert Neff

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  • I need excedrin

Posted 4 years ago

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Photo of Jeffrey Tranberry

Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Official Response
Our engineers have narrowed this down to an issue in the drivers for AMD cards on OS X. We're working with Apple to track down a fix.

The the meantime, the workaround is to disable "Use Graphics Processor" in Lightroom or Camera Raw
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Simon Chen, Principal Computer Scientist

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Official Response
The following AMD GPUs on Macs running El Capitan are blacklisted in Lr 6.6 because of reported driver issue with El Capitan: Radeon HD: 6330M, 6350M, 6370M, 6430M, 6450M, 6470M, 6490M, 6530M, 6550M, 6570M, 6630M, 6650M, 6730M, 6750M, 6770M, 6830M, 6850M, 6850M, 6870M, 6950M, 6970M, 6990M.

It is reasonable for Lightroom to take the step to blacklist these AMD GPUs until the driver issue is confirmed fixed in an Mac OS X update (see note). If you are sure to take the risk for working with the non-officially supported GPU with Lightroom. Try the following,

  1. Open Lightroom.
  2. Invoke Lightroom > Preferences... menu command
  3. When the Preferences dialog appears, select the Presets tab.
  4. Click on the button labeled “Show Lightroom Presets Folder...”
  5. Lightroom will reveal the root preset folder in the Finder/Explorer.
  6. Now goto  and download the config.lua file and copy it into the root preset folder at step 5. The config.lua setting would instruct Lightroom to bypass the blacklisting anyway.
  7. Relaunch Lr.

Hope this helps,

Note: Apple has informed us that the driver issue with these AMD card *may* have been fixed with the latest Mac OS X 10.11.5. So it would be good to get some confirmation from the folks who reported the issue here either with the Lr CC 2015.5.1/ 6.5.1 or with Lr CC 2015.6/6.6 following the documented workaround described above (with Mac OS X 10.11.5 of course).