1. First, please start or restart the system. When the computer just starts, please press the command+S key on the keyboard
2. Next, you will see a series of command characters on the screen. When you enter the security mode, you will see a command line input port starting from root. If you don't see it, press the Enter key on the keyboard twice. When we see root #, we enter the command fsck - y on the keyboard and press Enter.
3. After the above command is executed, let's continue to enter: mount - uaw
4. Then we enter the command: rm/var/db/ AppleSetupDone， Delete the current configuration file of the system
5. Next, enter the reboot command to restart the computer
6. It is worth noting that every time we enter a command, we need to press the "Enter" key on the keyboard, and then the system will execute it. If the above command operation is successful, then we can see the interface for reconfiguring the system, which is the same as the original activation of the computer.
7. Then reconfigure step by step according to the activation configuration prompt. In this process, we will be asked to create a new administrator account again. After that, the system will be reconfigured, and then you can enter the Mac system.
