Apple ID on 3 Apple TV's
I am trying to sign into my 3rd Apple TV and I entered my apple id and received an error message that the id is already in use my another user. Is there a limit to how many Apple TV's I can use with my id?
It appears there is no such limit. A few users have reported using double that amount of units successfully.
There are limits to how many devices can stream something specific to multiple devices at the same time. Also see: discussions.apple.com/thread/253421932.
If you are in setup, then you might be presented with a choice to use an existing account, or create a new user account. To create a new account, you have to use an email address that isn’t in use for Apple services yet. Verify that you made the intended choice there.