Cannot adjust brightness after Big Sur update

App & System Services Hardware Mac Device Management

Created Mar ’21

Replies 19

Boosts 0

Views 9.5k

Participants 20

I upgraded to Big Sur 11.2.3 and now the toolbar brightness keys do not work. Brightness indicator appears on screen and the buttons appear to adjust up or down, but the actual brightness does not change unless I manually go into Display Settings and adjust.

I've seen old posts about this issue from ~5 months ago, all marked as resolved. Is this a new issue with the upgrade?

Have tried restarting and turning off / on all auto brightness settings. My system is <1 week old, M1 Macbook Pro.

Thanks for your help.

Boost

Delian OP

Feb ’22

Same issue here…

NillaConke OP

Feb ’22

Same issue here on a 2017 Macbook Pro 13 inch 4 Thunderbolt 3 ports. had the problem in Big Sur and still have it in Monterey, downgrading to Catalina now hoping that helps. This has to be solved or recalled... I tried to reset NVRAM and SMC and all the fixes one can find online, nothing worked.

rodrigo.digao000@gmail.com OP

Aug ’22

I have the same problem on MacBook Pro (Retina, 15-inch, Mid 2014). I've tried to downgrade to Catalina and nothing changed, the same problem.

The worst situation about is because the brightness high does my battery last on just 2 hours.

Nilsf_rk OP

Sep ’22

Hello, i had the same Problem after the upgrade to Montery. This works for me: Installing OpenPatcher, then open it, click on „Post install Root Patch“ after that click on „Start Root Patching“ confirm with „Yes“ and your password, click on „Ok“ and let the setup run. After that restart your Mac Book (there will be a Pop up to restart confirm with „Yes“)

i Hope it will help you too.