The Xcode 12.1 (GM) image has just been released and can be selected as follows:
macos:
xcode: 12.1.0
Image Info
Xcode 12.1 Build version 12A7403 is installed at /Applications/Xcode-12.1.GM.seed.app
The following runtimes are installed:
- iOS 13.5
- iOS 14.1
- tvOS 13.4
- tvOS 14.0
- watchOS 6.2
- watchOS 7.0
The full manifest of installed software can be found here.