Xcode freezes after upgrade to 12.3
So if you have Apple Watch, try turning that off. Haven't checked to see if turning it back on will break xcode again.
You've got the same experience if your iPhone is connected to Xcode via Wi-Fi and isn't fully prepared for development or present errors in Devices and Simulators, it was my case. Removing "Connect via Network" works without need to reboot or anything else.
i unplugged all the wires ( Power and USB device ) and it seems to work for now
I connect my iPhone to M1 Mac mini directory, problem solved.
The same response is available here.
Best regards
But Finally disconnected iPhone cable from MAC, restarted XCODE, restarted iPhone it worked well.
I'm on Xcode 12.5 and have been getting a beach ball every 5/6 seconds for about a second. I noticed it mostly while editing source code files. I tried all the things mentioned in this thread with no luck (turning wifi off, I didn't have any devices at all in the Devices window, etc.). I think it was specific to the project.
At the top of the source code pane is a row of files that were previously opened. I removed all of those files and the problem seems to have been fixed. I probably had 50 files listed in there and had two editor panes open side by side. Option-click removes all the files at once.
This seems to have worked for me.
FFFFFFUUU Version 13.2.1 (13C100) freeze like a hell after upgrading os to Montery 12.1 (21C52) from big sur.
I have the same issue. Rebooth does not stop the freezing