If you’d rather not touch the contents of that user account, you can select “Don’t Change The Home Folder.” However, if you’re sure you want to get rid of all data from that user account, you can pick “Delete The Home Folder.” To do this, click “Save The Home Folder In A Disk Image.” You can choose to retain its home folder as a disk image in the “Users” folder of your Mac. Now is the time to decide whether you want to retain some of the data associated with the outgoing user account.

To delete a user account from the Mac device, select the correct user name in the left pane and then click the “-” (minus) button below “Login Options.” Once you’ve ensured that it is an administrator, switch back to your account on the Mac and return to “Users & Groups” under “System Preferences.” Once again, click the lock icon in the bottom-left corner of this window, type your user account password, and click the blue “Unlock” button. To make your account an administrator, click your user name in the left pane and check “Allow user to administer this computer.” Note that a restart is needed for these changes to take effect.

How to remove multiple desktops on mac