If you’re an administrator on a Mac, there are a few steps you can take to delete an admin account.

  1. Open System Preferences and select the Accounts tab.
  2. Scroll down and select the Delete account button.
  3. Type in the administrator’s password and click the Delete button.
  1. On the login screen, click the Apple icon in the upper-left corner and select System Preferences.2) Click Users & Groups.3) Select the user account that you want to delete. Click the – button at the bottom of the list to delete it.

How to Delete a User account on macOS Sierra