Make sure you don’t accidentally delete the only administrator account on the computer. If there is only one administrative account on the system, you cannot remove it; instead, you must either change one of the other accounts to an administrator status or establish a new administrator account and then remove the old one.
On the bottom left, click Users & Groups. … The padlock symbol appears. … Enter your password in the box. Select the admin user on the left and then choose the minus sign near the bottom. Choose an option from the menu and then Delete User.
The macOS utility menu may be used to erase your Mac computer, or in other words, reset it. If your Mac is not operating properly, or if you want to sell it, this is a good strategy. This will delete all of your personal data and programs. It’ll be as if you just switched on your Mac for the first time.
Select Settings from the drop-down menu. Then choose Accounts from the list that appears. From the drop-down menu, choose Family and Other Users. Select your favorite admin account by clicking on it. To finalize your selection, click Remove.
Option 1: Using the Large icons view of the Control Panel, open User Accounts. Enter your original password and leave the new password boxes empty; then click Change Password. Your administrator password will be immediately removed.