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uacd

macrumors 65816
Original poster
Feb 16, 2024
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Hi dear MR users!:)

So, I’ve pulled the trigger and finally decided to update my MBA M1 to Sequoia from Monterey. And it was instant regret: macOS Sequoia is RUBBISH. Animations work at 10FPS, apps take ages to open, laptop feels like if it is booted in safe mode, Macbook started overheating for the first time in its life. Hadn’t ever seen such a weird behavior on Monterey.

I downgraded back. But I got a nasty bug: brightness controls no longer work. The only “bugfix” is to put MacBook into sleep mode and out of it (or close the lid and open, which effectively does just that).

Since this Mac no longer can SMC or NVRAM reset (and believe, I’ve tried it thru Terminal - no luck), have you had similar bug? I had already sent bug report to Apple but since they usually “take their time” to look into these bugs, no longer expecting anything from them.

So I’ve tried restarting and even reinstalled macOS again via recovery mode: nothing.

I believe Sequoia updated my firmware drivers and Monterey didn’t roll them back. And thus it creates some weird conflict.

I wonder did anyone else have this bug? Did you find the solution? I’ve googled but the only solution people found is to create a terminal command and run it as automation when Mac boots, so it would put it to sleep and out of it automatically
 
How did you "downgrade back"; via DFU restore?
Thank you. I will definitely try it. In a month will have an opportunity to use another new Mac with USB-C ports, unfortunately don’t have another Mac to try and restore DFU. Hoping it helps, will report back if it does work!
 
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