HT202731: Using Apple Diagnostics
Learn about Using Apple DiagnosticsQ: i have an I MAC EL CAPITAN. the F2 key suddenly does not increase the brightness. why is it not working now. i u ... i have an I MAC EL CAPITAN. the F2 key suddenly does not increase the brightness. why is it not working now. i uses the F1 to decrease the brightness but the F2 does not. more
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Helpful answers
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Mar 15, 2016 8:32 AM in response to noelfromjacksonby braden85,Hi noelfromjackson,
I see that you are experiencing an issue with your brightness adjustment on your keyboard. I think this article most clearly relates to your situation, and should be able to help you address this:
OS X Yosemite: If keys on your keyboard don’t work
https://support.apple.com/kb/PH18412
Thanks for coming to the Apple Support Communities!
