We have a problem with our Mac. It fails to recognize the username/password for the other person's account. What I mean by that is that if I'm logged into my account, and I want to install something or download updates, and it needs authentication on both my account and my wife's (the "other person's account"), it will accept my credentials but reject my wife's. Likewise, if she's logged into hers, it will accept her credentials but reject mine.
What could be causing this and how can it be fixed?
What could be causing this and how can it be fixed?