MacBook Pro “PIN has invalid format”

Alright so… PIN is very different from password. If it’s asking for PIN… think of if you’re logged in to anything that requires that OR if you have hardware connected (I had my military cac plugged in) it was asking for my PIN for that and let me log in that way… didn’t even know it was possible lol. You can also just unplug everything and it should go back to asking for “password”

restarting and resetting password does nothing if you see that it’s still asking for PIN

Check whether your caps lock key is on or not. If you can't see if it is on or not, toggle it and try again. If toggling the caps lock key doesn't help, then you might be having a damaged key(s) in your keyboard. If so, you may have to use an external keyboard for the time being, and then change your pin.

AlDelVecchio wrote:

CAPS lock is definitely not on. I changed my password to a different one, and it still not take it. Pretty sure keyboard is working just fine. Says “Pin has invalid format” still.

If you've changed your password to a different one means your former password was accepted for that. Maybe the changed password has a character that is invalid. But, I can't imagine the computer accepted an invalid character at that time. When you click a given key, it might not sending the right letter or number. Maybe, you should try an external keyboard first. If nothing helps, then you may have to reset NVRAM/PRAM and/or reset SMC, or both. By the way, have you misremember your changed password/pin?

Glad that you got it working. 👌

Maybe, you should disconnect iCloud for the time being until you get everything corrected.

In case this helps anyone... Just had this happen to me. Turned out it was because I was logged into Microsoft office (via Teams) and it was asking me for my PIN for that!

What did you unplug exactly ? I’m having the same issue