System preferences
Hello, I am trying to unlock my system preferences on users and groups, but I have no idea what my username and password is. I have tried every login I can think of, but it still will not log me in. Can anyone help?
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The password it is asking for is your administration password for your Mac. The one you might get prompted for when you restart your Mac or try and install a new application.
If you still do not know what your password is - it can be reset in a number of ways. Check out this article from Apple to see if anything on it helps - https://support.apple.com/en-us/HT202860