-- iOS --
iOS 12.4 (Downloaded)
iOS 13.0 (Downloaded)
iOS 13.1 (Downloaded)
iOS 13.2.2
iOS 13.3
iOS 13.4
iOS 13.5
iOS 13.6
iOS 13.7
iOS 14.0.1
iOS 14.1
iOS 14.2
iOS 14.3
iOS 14.4
iOS 14.5
iOS 15.0
iOS 15.2
iOS 15.4
iOS 15.5 (Bundled with selected Xcode)
iOS 15.5 (Downloaded)
iOS 16.0
-- watchOS --
watchOS 6.0
watchOS 6.1.1
watchOS 6.2.1
watchOS 7.0
watchOS 7.1
watchOS 7.2
watchOS 7.4
watchOS 8.0
watchOS 8.3
watchOS 8.5 (Bundled with selected Xcode)
watchOS 9.0-beta1
watchOS 9.0-beta2
watchOS 9.0-beta3
watchOS 9.0-beta4
watchOS 9.0-beta5
watchOS 9.0 (Downloaded)
watchOS 9.1-beta1
-- tvOS --
tvOS 12.4
tvOS 13.0
tvOS 13.2
tvOS 13.3
tvOS 13.4
tvOS 14.0
tvOS 14.2
tvOS 14.3
tvOS 14.4
tvOS 14.5
tvOS 15.0
tvOS 15.2
tvOS 15.4 (Bundled with selected Xcode)
tvOS 16.0-beta1
tvOS 16.0-beta2
tvOS 16.0-beta3
tvOS 16.0-beta4
tvOS 16.0-beta5
tvOS 16.0
tvOS 16.1-beta1

Note: Bundled runtimes are indicated for the currently selected Xcode, more bundled runtimes may exist in other Xcode(s)
