See if any of the following articles can help:

Hack Mac Password Single User Mode Windows 10

• Can't Log In to Your Mac? Create a New Admin Account - Lifewire
• Change the Admin Password with Mac OS X Single User Mode - OSXDaily

We all mostly know a number of methods to bypass a Windows Administrator Password ( Hacking Windows Administrator Passwords) + ( Videos Link), today we hack into a Linux machine root user password.We are aware that like Windows where Administrator is semi God, in Linux system, root is.

You can also reset the Administrator password by using Recovery Mode, as follows:

• Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
• When the menu bar appears select Terminal from the Utilities menu.
• Enter resetpassword at the prompt and press RETURN. Follow instructions in the dialog window that will appear.

Single User Mode Mac Commands

Hack Mac Password Single User Model

Once you reset the Administrator password, restart your notebook, and then, log in as the Administrator. From there you can reset any of your user account passwords.

Single-user mode

1. Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery.
2. Select Disk Utility from the Utilities window, then click Continue.
3. From the Disk Utility sidebar, select the volume that you're using, then choose File > Mount from the menu bar. (If the volume is already mounted, this option is dimmed.) Then enter your administrator password when prompted.
4. Quit Disk Utility.
5. Choose Terminal from the Utilities menu in the menu bar.
6. You can now enter UNIX commands. When done, choose Apple () menu > Restart.
   

These steps replace the Command-S method, which doesn't work with the recommended settings on current Mac computers.

Boot Mac Single User Mode

Verbose mode

Mac Single User Mode Repair

1. Turn on your Mac, then immediately press and hold Command-V.
2. Continue holding the keys until you see white text on the screen.
   • If you're using FileVault, release the keys when you see the login window. Then log in to continue starting up in verbose mode.
   • If you're using a firmware password, you must turn off the password before you can start up in verbose mode.
3. You can now enter UNIX commands. To exit this mode and start up normally, type reboot, then press Return.