How do I disable the guest user? Is there a reason why it gets created? It won't mess up any of my files or data on my computer right? Is find my Mac suppose to randomly create it?

  • The creation is not random, it's intentional. You choose whether or not to enable it in sys prefs/user accounts – Tetsujin Jul 17 '15 at 20:24

With Find My Mac enabled, someone who found the computer could sign into the guest user, which could then be located via iCloud. The guest user is a feature of the operating system which allows people to temporarily use your computer but not save any files.

You can go into Users&Groups System Preferences and disable it, for more details see this article

Just make sure you don't sign into it and expect files you save to still be there after restarting the computer :)

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