FYI see FB12453767

I don't think this is the intended way either. When you download beta 3, Xcode is downloaded as a zip and iOS is downloaded as a dmg The intention seems to be that when you run Xcode, it should use the iOS dmg file. however, it downloads the iOS component again. Also, the Xcode zip should be unzipped to into /Application rather than /Downloads The steps needed are Download Xcode an iOS Move the Xcode zip to \Applications Unarchive Xcode by opening it The rest is a mystery

The issue of logging into the App Store is affecting VMs using Fusion, UTM, Parallels and even Apple's own virtualisation sample code on the developer forum.