Answer
- One possibility is that you enabled Guest User in the Security & Privacy settings.
- If you didn’t enable it, someone else may have logged in as a guest.
- To find out who the guest user is.
- Open the Users & Groups preferences and select the Guest User account.
How to use the Guest Account in Mac® OS X™
Mac How to Create Guest Account and Access
If you’ve recently noticed another user account on your Mac, it’s likely that someone else has logged in to your computer without your knowledge. This could be a family member, friend, or even a stranger who has managed to get access to your device.
There are several things you can do to investigate and address the situation. First, check the login history for any unknown devices or IP addresses.
To delete a current user on your Mac, open System Preferences and select the Users & Groups pane. Select the user you want to delete and click the – (minus) button below the list of users.
Your user account on your Mac is the name you use to sign in to your computer. By default, your user account is also the name of the home folder on your Mac.
If you want to remove another user from your Mac login, you can do so by going to System Preferences and selecting Users & Groups. From there, you can select the user you want to remove and click the minus button.
To login as a different user on a Mac, hold down the “option” key and click on the “log in” button. A list of users will appear and you can select the one you want to login as.
To change users on the Mac lock screen, you first need to unlock the computer. Then, click on the user icon in the top-right corner of the lock screen and select the user you want to log in as.
To remove a current user, you will need to delete their account. You can do this by logging into their account and deleting it, or by contacting customer service.
There are a few reasons you might not be able to delete an admin on your Mac. One possibility is that the admin is currently logged in and using the computer. Another possibility is that the admin has been locked out of the computer. In either case, you’ll need to log out of your account or unlock the administrator account before you can delete it.
The administrator password for an Apple device is the password that is used to make changes to the settings on the device. This password can be changed in the settings of the device.
To see hidden users on a Mac, open the Users & Groups preferences pane in System Preferences. Select the lock icon in the lower-left corner of the window and enter your administrator password. Then click the + button below the list of users to add a new user. In the dialog that appears, select “Hidden User” from the “New User” popup menu.
If you are the administrator of the computer, you can switch users by pressing Ctrl+Alt+Delete and selecting the user you want to log in as. If you are not the administrator, you can ask the administrator to log in as another user.
To create a new user, open the Settings app and select “User Accounts”. Tap the “+” button to add a new account. You’ll be prompted to enter the user’s name, email address, and password.
To find your administrator username and password on Mac, open System Preferences and click Users & Groups. Your username will be listed in the top-left corner of the window, and your password will be hidden behind a key icon.
To find your administrator username and password, you can either check your email or contact your system administrator. Your administrator username and password are typically included in the welcome email that was sent to you when you first registered for your account. If you can’t find your administrator username or password, contact your system administrator for help.