Screen not waking up, after Tahoe upgrade

Sequoia changed how the lid sensor (magnet + Hall effect sensor) reports its state to macOS which is the reason for the error. Putting this into my terminal helped :)

sudo pmset -a disablesleep 0
sudo pmset -a sleep 5
sudo pmset -a lidwake 0
sudo killall -9 powerd
sleep 3
sudo pmset sleepnow

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

I found that I can wake up my MBP with the touch of start/turn off (upper right of Keyboard) if this can help.

Update: I’m still having the problem, but it happens infrequently rather than all the time. (M1 Mac mini (2020) and the problem started with Tahoe.)

First thing was I reinstalled the OS, then I went into the startup menu and removed anything unnecessary, I removed anything display related like Flux, and I removed VirtualBox (just because a process was running and I don’t use it). Not sure how much any of these have to do with the issue, but my main goal was to remove any unnecessary background processes, especially if it affects the display.

My monitor wakes maybe 80% of the time now. When it doesn’t, I have to unplug my monitor from my Mac and plug it back in.

Prior to this, I chatted with Apple Support for a lengthy amount of time and they confirmed it was a software issue and that they would hopefully fix it.

So I definitely still need a fix, but the issue is less annoying than it used to be (but still pretty annoying and unlike any other experience I’ve had with Apple).

There is a Tahoe update 26.1, it solves the problem.

I have had my M4 Pro Mac Mini since Nov 2024. This began happening to me after upgrading from MacOS 15 to MacOS 26 in September 2025. I currently have MacOS 26.1 and this is still happening. It doesn't happen every time I wake up the Mac, which I do several times a day. But 2-3 times a week or so, the monitor will fail to be woken up from sleep when the computer wakes up.

If I wake up the monitor from its sleep mode it reports that it is receiving no signal and is going to put itself back to sleep in a few seconds. It's not the monitor, it reports no signal on any port including the port I'm using (a USB-C to USB-C connection to one of the Mac Mini's Thunderbolt-5 ports). But I can tell the computer is awake: If I use my keyboard to change the volume to the speakers (attached via the headphone port on the Mac Mini) I can hear the volume-change feedback clicks.

For me it isn't a big deal: I can either unplug the monitor cable (from either the monitor or the computer) and then plug it back in. Or, more simply, turn the monitor off and turn it back on again.

But it is an annoyance and the first time it happened I was afraid my Mac had gone belly-up.

Possible answer...

When I unplugged my monitor, waited 30 seconds and plugged it back in, all was fine.

For me, it helped hiting the ESC key (sometimes repeatedly).

Agree. M1 Mac Studio here.

Have tried pressing various keys - no joy. Have tried plugging and unplugging keyboard and mouse - no joy. Also feared that Mac Studio had gone belly-up. Thankfully, rebooting has worked, but having to force a reboot presents its own problems for unsaved things. Have not tried disconnecting and reconnecting monitors since doing the same with keyboard and mouse did not work, but will try this next time as it would be a preferred solution over rebooting and losing stuff.

All of this started after upgrading to Tahoe 26.1, despite having waited for 26.1 in order to avoid new OS buggy-ness.

Also have an ongoing problem getting system to go to sleep which started with Sequoia, I think.

Please get this fixed Apple. I had switched to Macs back when Windows 8 was such an unstable OS and now MacOS is the unstable one.

26.1 did not solve it for me. Started with 26 and continues with 26.1. Neither does touching or pushing the fingerprint button. I end up just having to hold it down and reboot. It doesn't happen 100% of the time, but very frequently and always if it's been asleep more than an hour or so. MBP 14" M1 Pro

On my iMac 2020 it is even worse: it does not recognize either touchid or password and cannot be activated anymore. A reboot is the only solution, but after a few minutes it happens again. The Mac has become unusable.

lucky enough I have not upgraded my MacbookPro yet, I will wait until this has been fixed.

I did a reinstall of the OS and the issue still occurs. I ran the terminal commands that s4intdavid recommended and it still occurs. Few other notes based on other comments: It happens whether the MBP is being charged or running on battery. It occurs about 90% of the time my MBP goes to sleep.

After the Tahoe update my MacBook Pro Intel i9 2019 doesn't wake up after standby... it takes about 5-7 seconds and it don't recognize my Touch ID I need type my password manually