MacOS – Changing App Store Login

My first thought is that you can try repair the disk permissions in Disk Utility. Might be a problem with some files.

Do you get the actual login prompt or just nothing happens? Do the content in the store load?

Think I found an answer: https://jamfnation.jamfsoftware.com/discussion.html?id=6025

sudo defaults write /Library/Preferences/com.apple.loginwindow DSBindTimeout -int 8

Changes the bind timeout to 8 seconds. Our bind happens within 3-4 seconds over ethernet, so we figure double it and add an extra second should be enough for an absolutely unscientific unengineering-like guess.