1, open System Preferences, select Users and groups;
2, if there is a lock in the lower left corner of the small lock, please click, and then enter the administrator password;
3, click on the bottom right corner of the landing options;
4, click on the right side of the network account server next to "join";
5. Select "Open Directory Utility ..." In the right lower part of the pop-up window.
6, in the pop-up window in the lower right corner, click on the small lock, enter the administrator password;
7, in full screen, note is the top menu of the full screen, select Edit, and then select Enable root account;
8. Enter the password for the root account two times and then exit;
9, restart the computer, when the start, pay attention to the choice of input user name and password which account;
10, the user name input root, the password is you just set the one, the login interface may be in English, in the system Preferences to tune into Chinese is good.
MacBook's root default password