I've set up an external display via USB-C to my MacBook Pro and MacBook Air (tried it on both). I can see the external monitor on the Arrange Displays screen and I can click on the monitor and change the resolution. However, when I click on the monitor (or the MacBook monitor) icon, it doesn't activate to allow dragging it to arrange the displays left or right. As noted, I tried this on both MacBook Pro 16" M1 and MacBook Air 15" M2.
Hello DrRLW,
We would like to see how we can help you with using your external display with your Mac. If the display is not made by Apple, certain settings might be available only by using the display's built-in controls and menu system. Check your display's documentation for details. Check out this link for more information: Connect a display to your Mac - Apple Support
Cheers!
I have an external monitor (Dell C3422WE) and after the last ventura update 13.6.6, I can no longer put the displays on top of each other (aka "mirror"). Re-arrange side by side works. When I put them on top of each other, the displays start to reset, but then then the re-arrange reverts and they go back to side by side. And a few times now, the entire OSX crashes. This is the same ext monitor in the office that worked the past months.
Edit: using "mirror" rather than drag-and-drop in the rearrange window works for me. Somehow, the last update must've reset some of the settings. "Mirror for Dell C3422WE" fixes this.
Can't Arrange Displays in MacOS Ventura
