I don't use my Mac Mini much, mainly due to how clumsy and ****** OS X is. Mostly used for holding media. So here is another crappy occasion. Was going to use it today for some video stuff. So I did the round of pending updates, 10.11.2, one drive, etc etc. Bunch of my app store apps are tossing errors, 'Sign in to use this application on this computer / ... was purchased using the App Storeo n another computer.... blah blah" I have only ever used my one AppleID... and I did purchase these apps, and have used them many times on this computer in the past. It won't take my AppleID password.