Mac system forgot login password what to do

model: MacBook Air

System: OS X Yosemite 10.10.5

When you forget your Mac system login password, there are two main ways to solve this problem:

First: Create a new account with single-user mode

After power on, press and hold the Command+s key, enter SingleUser mode (single user), enter MOUNT-UAW/ carriage return after bash-3.2# , and then enter rm-rf/var/db/. Applesetupdone Enter, if there is no error message, the execution is successful (can be performed by performing the echo $ validation), such as:

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Enter reboot return to restart the computer, will go directly to the system installation of the initial interface (do not worry, the data in the computer is not lost!) ), all the way down, to the end of the new Administrator account to enter the system, you can go to the "System Preferences" users and groups to modify the original account.

PS: This method bypasses the system login and its password mechanism, through the login initialization, the new user account

The second type: Change the password via Recovery mode terminal

There are two ways to do this, and eventually you change the password by entering the recovery mode terminal:

1 , boot hold down the Command+r key, wait for the white Apple to appear, the progress bar read, go to " os X utility " Utilities "-" terminal " in the toolbar at the top of the screen, and then enter ResetPassword after you eject the terminal box. Reset Password box, where you can modify all account passwords, including root (super Admin), and "Reset personal folder permissions and ACLs", such as:   

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once setup is complete, restart your computer and log in to the system with your new password.

PS: After resetting the password in this way, the user's default keychain password has not changed, can click "Create new keychain" after login

2, plug in OS X installation CD or u disk, power on and hold the option key , wait for the white Apple to appear, the progress bar after reading, select OS x installation disk, you can enter the initial installation of the system interface, after the steps ibid! ( This step requires a third-party tool, and the progress bar reads slowly, so the first method is recommended )

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Mac system forgot login password what to do