1. Locate the Mac OS X system CD that came with your Apple computer, or a USB flash drive/removable hard disk with an Apple MAC OS X system image plugged into the optical drive (or plugged into the USB/FireWire interface). Restart the Apple Computer, press and hold the "option" key (Alt key under Windows)
When this boot disk selection interface appears, select the system installation disk
When the menu bar appears, do not "next". Select "Utilities" ... "Reset password" does not see the "Reset Password" option. can click "Terminal", enter ResetPassword, return. The password reset screen will appear later.
2. Restart the Apple Computer, press and hold the "command" key (under Windows for the win key) and "s" key, will enter the single user mode, enter the following three commands:/sbin/mount-uaw carriage return Rm/var/db/.applesetupdone Enter (note ".") No space before) reboot enter the Apple Computer will restart, and do not need to login password (familiar with Linux or Unix command users should see, "rm" it)
Mac System Log-in system workaround