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davidg4781

macrumors 68030
Original poster
Oct 28, 2006
2,970
476
Alice, TX
Hopefully someone can help with this. Here's my hardware...

2011 Mac mini running macOS High Sierra
LED Cinema Display 24" (I think!)
Apple Keyboard (2003 version, I think!)

There've beens some times when the brightness controls aren't working. When I press F14 and F15, the box pops up on the screen but the bar doesn't move and the brightness doesn't change. To get it to work, I have to shut down and restart the mini.

I currently have f.lux and Amphetamine installed, but I had them before this started happening.
 
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