Update

Mojordy2:

“Update: I am trying to restart my MacBook Pro to install an update. It keeps asking for an administrator name and password. I have no idea what this would be. HELP!”

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Determining All of This:

It’s probably the same username and password you use to log in to your computer with to use it.

Revealing your Username:

1. Go to: System Preferences
2. Tap: Users & Groups
3. View: what user is listed at the very-top.

The Top-Listed user would be the username you are logged in to.

Underneath it, it should show if you are an administrator(in dull-grey font).

So, if an Administrator, enter that Username, and use the password you use to log in.

If you are the FIRST or ONLY User, that Admin user-name and password is YOURS!

Your regular every-day username and password. (NOT your Apple-ID or its password).