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.

+1, this gave me a hard time when prewarming Xcode on our dedicated CI machines.

Same symptoms, xcrun simctl unresponsive, Xcode showing unavailable status, hanged in overall.

I can't really recall this happening ever before. 🤨

I have the same issue with Xcode 26.4 after installing macOS 26.4.

What help is (do it at your own risk, no guarantee):

  1. Force quit Xcode
  2. rm /Library/Developer/CoreSimulator/Images/images.plist
  3. Wait 1-2 minutes
  4. Launch Xcode

You will be able to download the Platform Support Components from Xcode again.

@diniska , does your remedy survive a reboot of the machine? When I tried my cleaning (I did the whole CoreSimulator directory, but now I see that I probably only needed to do the images.plist file), my simulators downloaded fine, but then they disappeared again after I rebooted my machine.

Xcode now hangs; SDKs are "status unavailable"
 
 
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