Can anyone help??
I've just moved to macOS Sequoia 15.3
Now my second display (thunderbolt) which worked perfectly, about 2 hours ago is now dead and cant be detected. I've looked on line and it turns out it's a common problem. I wish I had just left the upgradfe.
IS there a fix?
Thank you
iMac 27″, macOS 15.3
It's very clear there is an issue with this update, the internet is full of it, already at least more than a month. No solutions worked for me. This is 100% a software issue on apple's side. I need the second screen for work and it affects my productivity a lot. When will Apple fix it?
This is the solution that fixed my problem. Thank you!
You are literally a life saver, I can't thank you enough
This fixed my issue finally. Thank you!!!
Servant
I apologize if I was rude. Thank you for your help.
Thank you so much, this worked for me (Mac mini m2)
Hi there. Sorry which solution worked for you?
This thread has become very vrey long.
Thanks
Thanks a lot! This helped me!
I just want to confirm that this approach works and solved my problem. Thank you for sharing
Appreciate it!! As of today, March 2nd, this worked for me on a MBP M1 Pro... Thanks!
Ya mon...worked! Connecting a different USB-C hub and both monitors were detected as normal.
Thanks bruh!
@Matias_L
Ya mon...worked! Connected a different USB-C hub and both monitors were detected as normal.
Thanks bruh!
Thank you. It was easy to just trash this file and restart and problem solved.
apple.windowserver.displays.<hex_string>.plist .
One more thing. Is anyone having mouse problems since the upgrade. Problems only happen when second monitors are plugged in.
That worked. I found this file and deleted it and restarted my computer: The file path is /Library/Preferences/com.apple.windowserver.displays.plist.
Thanks for the information. I'm a discussions.app.com newbee.
Removing this file fixed it...com.apple.windowserver.displays.plist
macOS Sequoia 15.3 wont let me detect my second display
