How to remove Guest option from login screen?

Solution 1:

@andyshinn OK, I see on your screen shot, that is not Guest user icon, that is Group user!

It says Other (not Guest).

The Guest user shows with one face, the group shows with multiple faces, like your icon.

I see you are at work. Do you have a group user account set up by your IT people?

Let me clarify that. Someone or something (a program) has put a login and hidden it from you so you can not delete it.

Well you can now do something since you know about it. First lets find out who! then decide if you want to delete it.

Solution 2:

I was able to confirm this being tied to "Find My Mac" being enabled by toggling the option while setting up a new Mac, however I'm unable to revert back to the previous state where the only options are normal user accounts. I've disabled "Find My Mac", signed out of iCloud, rebooted, removed com.apple.loginwindow.plist from /Library all with no change.

What I CAN tell you is that you can login without needing to use the trackpad/mouse:

• At the login window you can use the right or left arrow keys to select a user
• Click return to select the user
• Enter your password and click return again to log in

Solution 3:

Possible solution:

How to disable the root user (your "Other" login account) OS X Lion

From the Apple menu choose System Preferences.... From the View menu choose Users & Groups. Click on the lock and authenticate with an administrator account. Click Login Options.... Click the "Edit..." or "Join..." button at the bottom right Click the "Open Directory Utility..." button. Click the lock in the Directory Utility window. Enter an administrator account name and password, then click OK. Choose Disable Root User from the Edit menu.

Just in case you are wondering: You are NOT the root user.

About the root user

The user named "root" is a special user in UNIX-style operating systems that has read and write privileges to all areas of the file system. The root user should only be used for specific administration or monitoring tasks. After completing a task as the root user, you should log out of Mac OS X (this is what your IT forgot to do) and log back in using a normal or administrator account. You should disable root access if you do not use it often.

The root user does not appear in Users or Accounts preferences.