How to Delete a User on a Mac

First, click the Apple logo in the upper left-hand corner.

Select "System Preferences" from the drop-down.

Next, click "Users & Groups."

Select the lock in the lower left-hand corner of the window.

Enter your user password. Remember, your user password and Apple ID password aren't the same. Your user password is the password you use to log in to the Mac.

Now, select the user you want to delete from the left hand side of the window.

Select the "-" to remove that user.

Next, you will be given a few options to select from.

1. Save the home folder in a disk image- this saves the home folder and any data in that folder for later access, though I would discourage this. It takes up space on your Mac. Simply consider backing up whatever user you are going to delete before deleting.
2. Don't change the home folder- this keeps that user's home folder as is. I would not recommend this options, and, again, recommend simply backing up any data you want from that user before deleting it.
3. Delete the home folder- this option deletes the home folder and data so it isn't taking up space on the Mac. I recommend this option, as long as you saved any data you wanted from that user and understand all the data from it would be gone.

After you select the best option for you, click "Delete User."