I watched 10+ sessions on visionOS, excitedly installed Xcode 15, and just like you I can't create a target for visionOS. Turns out, the SDK is not ready yet.. Other than this webpage, nowhere else tell us it will only be released later https://developer.apple.com/visionos/

Same here. It's a world wide issue. Can someone raise this in WWDC 2023?

ProcessInfo.processInfo.isMacCatalystApp returns true for: Mac app built with Mac Catalyst, or iOS app running on Apple silicon If you specifically wants to know for (2), then use ProcessInfo.processInfo.isiOSAppOnMac