How long should it take Catalina to set up?
How long should it take for Catalina to set up on my MacBook Pro?
According to: If your Mac is stuck on the 'Setting Up Your Mac' screen - Apple Support
"This stage should take no more than 10 minutes to complete. If it never completes, your Mac might be unable to quit the setup assistant, even though setup is complete.
To resolve, press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off. Then turn your Mac back on. Your Mac should now start up normally."