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You receive the following error message when you try to download and install Mac OS Catalina:

"Gateway Timed Out"

This can happen when...

  • a lot of users are downloading or installing Mac OS Catalina at the same time.
  • there is slow Internet connection.
  • your Mac does not have enough storage space available.
Expand All
Restart your Mac in Safe Mode
Clear download cache in App Store
Check your Internet connection
Check the RAM and available storage
Keywords: Mac OS Catalina, Gateway Timed Out, Catalina failed to download, Upgrading to macOS Catalina