- Reboot into recovery mode: hold Command + R key while rebooting until the Apple logo appears
- Select Utilities->Terminal to open a terminal
- Type “csrutil enable” and hit Enter key
If MacOS is missing
You will need to have Wifi and internet access to reinstall macOS.
If MacOS is present
If you know the password of the admin user, congratulations!. Otherwise, follow these steps to reset the password:
Download the following files from