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  1. #1

    Member Since
    Mar 20, 2010
    My screen keeps changing brightness!
    My 21.5 imac keeps changing screen brightness, it goes from 100% brightness to 80 or 60% brightness every few seconds and then back to 100%. what is going on? how can i fix this? its really bugging me.

  2. #2

    Member Since
    Jan 17, 2010
    2.8 GHz 15" MacBook Pro OS X 10.7.x & some old Macs
    I don't know if the iMac has the same ambient light auto adjust as the MBPs do but if it does then that's likely the causes of your problem. To fix it go into system preferences and in the display icon uncheck the automatically adjust brightness as ambient light changes.

  3. #3

    Member Since
    Mar 20, 2010
    i called the mac people they have no idea what to do either.. im starting to hate macs/apple -.-

  4. #4

    Printerman's Avatar
    Member Since
    Mar 25, 2010
    Mid 2015 15" rMBP, 2.8GHz i7, 16GB RAM, 512GB Storage, AMD Radeon R9 M370X, 10.11.1
    Hey, now you’re sounding like a troll, IMO.

    Try a permissions repair.

  5. #5

    Member Since
    Apr 13, 2014
    Auto brightness is in Settings
    Take a look at the attached image, turn off this feature in your Settings to disable your MacBook from taking control of the light! Just don't go into the darkness.
    Attached Images Attached Images

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