Tuesday, July 30, 2013

Disable Automatic Screen Brightness Dimming in Mountain Lion (OS X 10.8)


This may require adjusting two settings in the System Preferences menu:

First:
  1. Open System Preferences (in the Apple menu)
  2. Click "Displays"
  3. Uncheck "Automatically adjust brightness"
Second (if working on battery):
  1. Open System Preferences (in the Apple menu)
  2. Click "Energy Saver", then click "Battery"
  3. Uncheck "Slightly dim the display while on battery power"

Verification:
Screen should stop dimming automatically and also not adjust any manual settings that you have in place.

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