I've got a shared Mac from my company. The Mac was previously associated with another Apple ID. I logged out and I logged in with my Apple ID.
I urgently need to be able to develop for iOS 13, and for this reason, I need to update XCode to the latest version. When I open the Apple Store it starts prompting for Apple ID and password, and the Apple ID field is automatically filled with the previous Apple ID, the one I signed out. If I type my Apple ID and my password in place of that, after 30 seconds it prompts again for the same information, in the same way.
I've tried a lot of tricks, all the ones that came out when you google for this problem. But none of them helped. I tried signing out, restarting, enabling two factors authentication, removing the password prompt in the settings, but nothing made any difference.
The only thing I didn't try was putting a valid credit card in the payment settings of my Apple ID. The credit card I had inserted time ago expired, and I don't want to insert any credit card info on a shared computer. Furthermore, I just want to update a free app and I don't think there are no alternatives.