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DenisOvidiu Author

Level 1

65 points

MacBook Pro M1 Pro issue with dual display after updating to macOS Sequoia 15.1

Hello,

Yesterday I updated my MacBook Pro M1 Pro to macOS Sequoia 15.1.

All the time I have my laptop connected to an external display. After the update, instantly I got a problem where randomly my external monitor is turning off (like when you are unplugging the external display cable or stopping the "extended screen" from settings) and the main screen (that is on my external display) is moving to the laptop and in just one second, the monitor is "turning on" and everything is back to normal.

This is happening like 1 time each 2 3 minutes which is really annoying.

What I tried so far and the issue persist:

Change with 3 other cables - Same issue
Using another monitor - Same issue
Restart laptop

MacBook Pro 14″, macOS 15.1

Posted on Oct 29, 2024 1:11 AM

Top-ranking reply

smk235

Level 1

20 points

Posted on Oct 30, 2024 9:00 AM

Having a similar issue on my MacBook M2 Max. I have 3 x external monitors, 1 x running on HDMI cable & 2 x running on USB-C to HDMI cables. The monitor running on the HDMI port has zero issues, the 2 running off the USB-C ports will turn on for a few seconds, I can see my desktops than both go black within a few seconds. I've tried everything and still have the same issues. Very frustrating.

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82 replies

Dec 18, 2024 7:23 PM in response to DenisOvidiu

MacBook Pro M1 Pro issue with dual displa… - Apple Community

ZiaDaisy

Level 1

12 points

Nov 13, 2024 12:43 AM in response to ZiaDaisy

correction: iOS 15

Nov 12, 2024 1:21 AM in response to DenisOvidiu

I have the same problem with an HDMI to USB-C adapter. It worked fine before 15.1 but now I can't use my external display. Does anyone find a solution ?

Nov 13, 2024 11:26 AM in response to ZiaDaisy

ZiaDaisy wrote:

• correction: iOS 15

Correction: macOS 15. iOS is the operating system used by the iPhone.

Nov 14, 2024 11:12 AM in response to DenisOvidiu

Have the same issue in Macbook M1 pro in 15.1 with LG ultrafine 21,5” 4k. Randomly the monitor connects and disconnects many times during the day.

Nov 15, 2024 12:32 PM in response to Batalmasto

It didn't work for me either. Strange that I left the screen still with Lungo and nothing happened. When I started working more, the blinking started... Soooooo annoying...

Nov 20, 2024 8:28 PM in response to DenisOvidiu

Yes, I'm using Macbook Air M1 with LG 29 inch FHD + 21:9 monitor with Thunderbolt cable(for display) . After i updated to 15.1 immidiently ran into the same issue.

this must be fixed by Apple.

Nov 21, 2024 12:37 AM in response to DenisOvidiu

I have the same problem with MacBook Air M2

Nov 21, 2024 6:33 AM in response to til666

No. Actually worse for me--now it won't connect at all. It's crazy!

Nov 21, 2024 8:02 AM in response to DenisOvidiu

Hey, nothing worked.

Reverted to 15.0.1

Nov 27, 2024 4:43 AM in response to MisterBPK

How did you manage to revert back? I wish I could go back to Sonoma

Nov 27, 2024 10:24 AM in response to urchino

no resolution even in b_t_ channel till now.

Dpower1

Level 1

8 points

Dec 2, 2024 2:32 AM in response to DenisOvidiu

I have the same problem. But i found solution. You can use https://github.caffeine-app.net and when is active mac will not going into sleep mode...

HME1969

Level 1

0 points

Dec 4, 2024 10:25 AM in response to Dpower1

Do you mean... the screen doesn't black any more...? using caffeine seems to do something... (system is back up quicker I believe...) but screen keeps on turning black.

Dec 4, 2024 2:32 PM in response to Dpower1

Tried caffeine & amphetamine. None worked.

Even bought Thunderbolt 4 cable (not apple's) still no luck.

MacBook Pro M1 Pro issue with dual display after updating to macOS Sequoia 15.1