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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

My screen keeps changing brightness!

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Member Since: Mar 20, 2010
Posts: 3
Krato is on a distinguished road

Krato is offline
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.
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Member Since: Jan 17, 2010
Posts: 1,469
EndlessMac is a jewel in the roughEndlessMac is a jewel in the roughEndlessMac is a jewel in the rough
Mac Specs: 2.8 GHz 15" MacBook Pro OS X 10.7.x & some old Macs

EndlessMac is offline
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.
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Member Since: Mar 20, 2010
Posts: 3
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i called the mac people they have no idea what to do either.. im starting to hate macs/apple -.-
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Member Since: Mar 25, 2010
Location: Canada
Posts: 423
Printerman is a jewel in the roughPrinterman is a jewel in the rough
Mac Specs: iMac10,1, 3.06 Ghz Intel Core 2 Duo Processor, 10.10.2, 21.5" screen.

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Hey, now you’re sounding like a troll, IMO.

Try a permissions repair.

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Member Since: Apr 13, 2014
Posts: 1
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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.
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File Type: png Screen Shot 2014-04-13 at 4.07.47 PM.png (82.4 KB, 20 views)
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