When logging in my (very old, probably 1st generation) Apple TV, on the other devices i got the six-digit code but on the Apple TV it does not prompts for it. The SW version verification says it is updated to the latest one. As a result, I can't log in.
If you have Two-Factor Authentication for your Apple ID, and a device with older software, then the procedure is a bit special:
What if I use two-factor authentication on a device running older software?
If you use two-factor authentication with devices running older OS versions—like an Apple TV (2nd or 3rd generation)—you might be asked to add your six-digit verification code to the end of your password when signing in. Get your verification code* from a trusted device running iOS 9 and later or OS X El Capitan and later, or have it sent to your trusted phone number. Then type your password followed by the six-digit verification code directly into the password field.
There is a time limit before the code expires, so request your code (or a new code*) after entering the characters of your password, to use those precious seconds effectively for just the code.
I’m not even asked to login. All i get is « could not sign in » and a not responding Ok bar.
What model Apple TV?
Two-Step authentication on Apple TV
