User profile for user: DenisOvidiu
DenisOvidiu Author
User level: 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:

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

MacBook Pro 14″, macOS 15.1

Posted on Oct 29, 2024 1:11 AM

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User profile for user: Batalmasto
Batalmasto
User level: Level 1
20 points

Posted on Nov 14, 2024 3:56 AM

Finally the issue for me is solved. Instead of using a HDMI to USB-C adapter I purchased a DisplayPort 1.4 to USB-C adapter connected to the Dell G3223Q 32" and no more issues. I also deleted the display preferences files in MacOS:


/Library/Preferences/com.apple.windowserver.displays.plist

/Users/<YourUser>/Library/Preferences/byHost/com.apple.windowserver.displays.<ALPHANUMERIC_CODE>.plist


In the last case, it can be multiple files.


And then restart. I hope it can help

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

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