Hey, thanks for the report. The issue with checking for updates in 2.2.20 on macOS is similar to a known problem that the team is investigating.
For now, try this:
Fully restart your computer
Use Cmd+Shift+P and run “Cursor: Attempt Update”
If that doesn’t work, clear the cache: open Terminal and run rm -rf ~/Library/Caches/Cursor/ and rm -rf ~/Library/Application\ Support/Caches/cursor-updater
Download the latest version manually from https://cursor.com and reinstall