Cannot sign in to Music app

I had the same issue on new MBP, Sonoma, and got around it by instead going to Account>Sign up for Apple Music (rather than Sign in). I then clicked "Already a subscriber?" and signed in to an identical looking modal and voila. No idea why that worked...

Brilliant!! This worked for me too. I just could not get past the basic sign in screen and went to the Account > Sign Up (Join Apple Music) option instead. Chose "Already a subscriber?" and signed in there. Voila. Thanks billybones63!!

Generally this kind of scenario doesn't happen. If you are using any system optimizers like Advanced Mac Cleaner, or Mackeeper, that can seriously corrupt the stability of your entire system. All such software should be removed with http://www.reggieashworth.com/ AppDelete and use Etrecheck - the handy reporting tool for … - Apple Community

to discuss with the forum how to better manage your Mac.

Not sure you want to do that unless you do not want to restore your playlists, and libraries and album artwork you might have downloaded. Is this something you are willing to manually rebuild? I suspect that would be overkill.

Do you know for a fact you are logged in the user on the Mac that built the library?

Is the user that built the library based on the same AppleID account that you use to login Apple Support Communities? Typically your AppleID is one email address and password across all Apple services.

Can you verify with your password your login for discussions.apple.com and then verify whether or not Music can login with the same same email address and password?

Open the Keychain Access utility and rebuild your keychain.

You may lose some saved passwords on your system, but it should make sure everything is working again.

what a lifesaver. thank you.

WoW, you saved my day!

👍