- Joined
- Jun 13, 2018
- Messages
- 736
- Motherboard
- Prime X299-A II
- CPU
- i9 9980XE
- Graphics
- RX 6800 XT
- Mac
- Classic Mac
- Mobile Phone
Post specs of your monitor.
Also try disabling the following in System Preferences temporarily to see if the problem goes away.
View attachment 355418
Also in the 2nd attached image make sure the top is aligned for both monitors, that is if they are not the same res, try matching the top at least and not to the bottom.
View attachment 355419
Same story here https://discussions.apple.com/thread/8084557