Xcode now hangs; SDKs are "status unavailable"

My development work is paused as Xcode is now non-functional on my Macs. Loading any project into Xcode soon leads to a hang and Force Quit. The SDKs are listed as "status unavailable". No Simulators are available.

I've tried previous versions of Xcode; removing everything and re-installing; installation from the Store and direct from the Apple Developer site.

I've created a Feedback issue.

This happens on both of my Mac minis.

I'm running Tahoe 26.4 (25E246) on both.

I've had something like this happening since 26.4 and thought I was the only one. Have been slowly considering wiping both my machines (happening on my MBP and Mac Studio).

Following for the moment and will check to see if any of these fixes work. I'm currently back on 26.3 (working for now) and have submitted a bug report about a month ago.

Xcode now hangs; SDKs are "status unavailable"
 
 
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