In "Users and Groups", I see a "Guest User" listed there, as "Login only". However I do not want this user account. When I try to uncheck the "Allow guests to login this computer" for this user, I found that checkbox is greyed out.
So how can I disable or delete the guest user from my Macbook?
I have FileVault and Find my Mac enabled, but even after I disabled them, that checkbox is still grey out!
The reason I want to disable or delete guest user is that I found the process
parentalcontrolsd occupies a lot of CPU, I searched and found it seems I need to disable or delete guest user.