Forgot Admin Password

Try this

Try this

Shutdown your computer then...

1. Turn on your Mac and immediately press and hold Command (⌘)-R.
2. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
3. You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
4. Startup is complete when you see the utilities window:
5. 

Next at the top click utilities and then click terminal

type this command resetpassword no spaces or capitals

push enter

follow onscreen instructions

Follow the steps at > https://support.apple.com/guide/mac-help/reset-your-mac-login-password-mh35902/mac