Screen not waking up, after Tahoe upgrade

Anyone else facing the same problem? Seems to have started after the MacOS 26 upgrade: both when on power or on battery, closing the lid and allowing the machine to go to sleep mode, it then does not wake up and a restart is needed. Interestingly, the caps lock led seems to work, i.e. keyboard is responding, but screen remains black!

iPhone 16 Pro Max, iOS 26

Posted on Sep 28, 2025 8:43 AM

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Posted on Sep 28, 2025 8:52 AM

fvellis wrote:

Anyone else facing the same problem? Seems to have started after the MacOS 26 upgrade: both when on power or on battery, closing the lid and allowing the machine to go to sleep mode, it then does not wake up and a restart is needed. Interestingly, the caps lock led seems to work, i.e. keyboard is responding, but screen remains black!


For upgrade anomalies I would reinstall the macOS on top of the existing macOS to sort the issue


How to reinstall macOS Recovery (both M1/M2/M3/M4 and Intel) — How to reinstall macOS - Apple Support


11 replies
Question marked as Top-ranking reply

Sep 28, 2025 8:52 AM in response to fvellis

fvellis wrote:

Anyone else facing the same problem? Seems to have started after the MacOS 26 upgrade: both when on power or on battery, closing the lid and allowing the machine to go to sleep mode, it then does not wake up and a restart is needed. Interestingly, the caps lock led seems to work, i.e. keyboard is responding, but screen remains black!


For upgrade anomalies I would reinstall the macOS on top of the existing macOS to sort the issue


How to reinstall macOS Recovery (both M1/M2/M3/M4 and Intel) — How to reinstall macOS - Apple Support


Oct 1, 2025 4:10 PM in response to fvellis

I've been having the same issue on a M1 Macbook air. It started the very next day after I upgraded to MacOS 26 Tahoe. Also, I noticed the computer is slower, with applications crashing way more often than before (sometimes several times in the same day).


I have updated to MacOS 26.1 hoping that the problem would be fixed, but it wasn't.

Oct 11, 2025 3:22 PM in response to fvellis

Same issue here. Noticed it as soon as I upgraded. Turned off all the auto sleep options so it never went to sleep, which obviously avoided — but didn’t resolve — the issue. Then last night, force of habit put it into sleep mode instead of shutting down and now can’t wake it again. So annoying. Seems really odd that the only solution offered is to reinstall the OS. There have already been two OS26 updates I think — why has this not already been addressed?

Screen not waking up, after Tahoe upgrade

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