Resolving Washed-Out Colors on Legacy iMac Displays
If your 2013 iMac shows greyed-out or washed-out colors when the brightness is low on macOS Sequoia, it's a conflict between the legacy display driver and the new color management system.
The Fix:
- Disable Automatic Brightness: Go to System Settings > Displays and uncheck 'Automatically adjust brightness'.
- Color Profile Reset: In the same menu, change your Color Profile to 'Generic RGB' or 'sRGB'. This often bypasses the buggy hardware-specific gamma curves.
- Night Shift: Ensure Night Shift is turned OFF, as it can intensify the washed-out effect on legacy panels.
- Root Patches: Ensure you have the latest NVIDIA Kepler graphics patches applied in OCLP.
Original Question: "My late 2013 iMac automatically adjust gamma according to brightness."
 | I can't stop this or force it off in settings, and I tried searching up other cases similar to mines or asking around but I couldn't come to a solution. I'm running OCLP Sequoia and when my brightness is low all the colors become greyed/washed out, and when I increase them they become darker and get back to normal. [link] [comments] |
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