R stuck during S3 registration check

This worked for me to apparently fix my system:

Start with a newly rebooted system.

Uninstall XQuartz by dragging it to the trash.

Look in /Library/LaunchAgents/ for filenames related to xquartz.  Delete them.

Look in /Library/LaunchDaemons/ for similar files.  Delete them.

Reboot the system again, and install XQuartz again.

Relogin, and things seem fine.

______

Sometimes, just reinstalling XQuartz is sufficient.

https://www.xquartz.org


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