Past device history
my old Mac still is controlling my AppleID. Someone else has it
Apple TV (3rd generation)
my old Mac still is controlling my AppleID. Someone else has it
Apple TV (3rd generation)
Hi,
I assume you didn't following method.
What to do before you sell, give away, or trade in your Mac - Apple Support
I'd better change your Apple ID password as soon as possible.
Past device history