The best way to reset your Mac's administrator password is through the Password Utility, which is located on a Mac OS X installation disc. If you do not have access to a Mac OS X installation disc, you can change the administrator password by entering Single User Mode. This method includes running the command line application fsck, which scans your hard drive for inconsistencies before you move on to changing the password. Type the commands without the quotation marks but including any spaces.
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Start your Mac while holding the Command and S keys until text appears on-screen.
Type "fsck -fy" and press Return.
Type "mount -uw /" and press Return.
Type "launchctl load /System/Library/LaunchDaemons/com.apple.DirectoryServices.plist" and press Return.
Type "dscl . -passwd /Users/username password", replacing "username" with the targeted user short name and password with the new desired password, and press Return
Type "reboot" and press Return.
Tips and warnings
- This is not Apple's preferred way to change administrator passwords and mistyping these commands can potentially cause irreparable damage to your files.
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