[coldtea]

As in technically can't, or mere license-wise "you're not supposed to"?

[saagarjha]

Virtualization at least does not have a functional sign-in

[130e13a]

i could be completely wrong here, but i do seem to remember something about there being some physical chip in the machine that needed to be present for e.g. iMessage to work. this was a while ago but iirc they also somehow incorporated local Apple ID account management into that system.

[amelius]

I wouldn't be surprised if there are fuses inside the processor that tie it to your Apple ID.