Black screen issue after updating to Sequoia 15.3

I'm now on 15.4.1 and still experiencing the random screen blackout. The system runs for hours, sometimes days before the blackout occurs. After a display blackout I Shut Down/ Safe Boot, then Shut Down/ another Safe Boot, then shut down and normal Boot - and the system runs normally for hours/ days. The display that went black works on each boot, immediately after the blackout and shut down/ Safe Boot - so it's unlikely to be a hardware problem. I have tried just Shut Down/ normal Boot and that works, but it seems to me that it doesn't last long, so I do the double Safe Boot sequence. It's been running for 3 days 18 hours 18 minutes so far - but blackout is likely to happen again since it's happened before on 15.4.1.

Now on 15.5 and still having the problem - running with lid closed and two external monitors. Putting the computer to sleep and then waking it restores the screen, but it doesn't seem to last long. I usually do two Safe Boots followed by a normal Boot and it runs for 2-3 days. When on Teams (with clients...!!!) and the screen goes black, the camera on that display is still working. Opening the lid reconfigures the displays so I can continue, but the camera is still running on the blacked out display. Sometimes when checking the Settings/ Displays, the blacked out display is still showing, sometimes not; if not, then the Safe Boots are definitely required, and the blacked out display works immediately after the first Safe Boot. I've reported this to Apple as a bug - maybe more people should also, get some attention. It's frustrating...!!!

Shut the computer down completely and then start it up as opposed to doing a restart.

Get a USB Stick and create a 15.1 bootable stick. Then boot from that and rebuild your drive at 15.1. I had to do that when I upgraded to 15.2. Should not be painful.

The best advice I was given was to call apple support and tell them. If they can't fix it go back to 15.1. So far I am rock solid on 15.3 but as I said. Your mileage may vary.

Connect an external drive and use that to back up to with time machine. Do a full backup to that drive.

I updated to 15.3.1 less than a week ago and have three incidents of black screen after running for a few hours each time. I have a MacBook Pro 2019 running in clamshell (lid closed) with two external monitors. In all three cases the main external monitor went black. In two of the occasions I was on MS Teams with clients - very annoying to lose the screen. I opened the lid on the MBP and the system reconfigured so I could carry on with the meetings. The camera on the blacked-out display was still running throughout the meetings though. A cold reboot corrects the problem in each case. Hope there's a fix for this coming soon...!!!

Further to my comment of 6 March...I have updated to 15.3.2, hoping for a fix to this problem. It seemed to work for a while, but the problem is back again now. Observations: using the 2019 MBP with lid closed and two external monitors - Thunderbolt and LG - it's a Thunderbolt display that always blacks out. I've tried plugging into different ports on the MBP, swapping which one is Main versus Extended...and always the Thunderbolt that goes black. One might suspect the monitor, but this only started when I upgraded to Sequoia, and booting the MBP clears the problem every time, allows it to run for a while before it happens again. A Safe Boot and shut-down before a normal boot seems to allow a longer run (a few days) before the black screen appears again. The Apple description for Safe Boot says, in part: "Clears some system caches, including font caches and the kernel cache." Maybe that's a clue. Can anyone help with this problem?

...and further to my last comment earlier today (30 March)...the screen (Apple Thunderbolt) went black while working with MBP lid closed and two external displays, but TimeMachine was backing up so I didn't want to reboot. I was typing a LinkedIn message at the time in the main screen (which is the one that went black); finished typing the message even though I couldn't see the LinkedIn screen, hit enter, and the message was completed (though not visible). I opened the lid, the screens reconfigured, with the main display still black. I deleted the cache files, but there was no change; kept working anyway on the MBP display and the external LG display. I then went to watch TV for a couple of hours to let TimeMachine finish. Came back and the main display was working again...!!! The things that were different since the screen went black were: caches deleted; MBP lid still open; TimeMachine had finished its backup. I still think this is a software problem, given that it didn't start until upgrade to Sequoia and the fact that the problem always clears on a reboot. BTW, I checked the boot time (thinking that the MBP had rebooted itself while I was watching TV), but the System Report/ Software says: "Time since boot: 2 days, 3 hours, 22 minutes" - so, no, it didn't reboot while I was gone. What's happening...???

Does anyone know if Apple are aware of this issue? I believe it is a software bug.

I updated to 15.4 very recently from 15.1 or 15.2 (bought a new Mac mini M4 a few weeks ago) and have had a random 2-3s black screen occasionally with a Dell UW4025 via the Dell supplied DP1.4 cable. As others have been saying, I did not experience this before the update.

It is very annoying and after playing around with the energy settings and whatnot, it persists. I have also tried changing the cable, done a hard reset and cleared the caches.

Thanks in advance.

I'm now on 15.4.1 (May 2025) & just had it happen. This is more than frustrating when this is the machine I make my living on. As another user commented, when this happens in a meeting with a client it is not very reassuring to the client that I have my ducks at all, much less in a row! Apple, please address this!

I’m having the exact same issue on 15.5! I can’t get the screen to stay on for more than 2 to 3 minutes after waking it up. It goes completely black, but the camera and speakers still work, and I can get an external monitor to work via HDMI. This is super frustrating!