Does this only work when using a personal team? I've just tried a near-identical setup - Virtual Buddy 2.1, Xcode 26.5 RC, Tahoe 26.5 beta (not the latest). I'm still getting "Device My Mac is not registered to your team..." in XC on the VM. It says I do not have permission to register them, but I'm signing in with a developer account that has admin rights for the team in question. I'm signing in to the VM and Xcode with the same Apple ID fwiw. The app I'm testing uses iCloud and so I can't test it using a personal team.