Installing Xcode on Catalina

You probably want Xcode 12.4 which if my memory serves me wanted macOS 10.15.7 or later. Try the following link, and you may need to sign in with your Apple ID or create a free developer account:

https://developer.apple.com/download/more/

If you are not interested in a colossal download and are not developing graphical apps, then you might get by with just the Command-line tools for Xcode 12.4 which gives you the. Clang and Swift development tools for a fraction of the storage required by Xcode.

Yes.

Click on Get in the blue and white button in the upper right corner.

Yes, but you have to find a distribution that is older.

Check http://developer.apple.com/

The current Xcode 12.5 in the Mac App Store now requires Big Sur 11.0 or later, so no go for Catalina.