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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46 replies

Nov 21, 2024 8:14 PM in response to diogocnunes

I made a bootable usb with mac os 15.0.1 & clean install.

No other options available .

My mac is 2.5 yrs old.

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