Previously in 10.5/10.6 to reset a user's password in single-user mode one would have to type this: Code: mount -uw / launchctl load /System/Library/LaunchDaemons/com.apple.DirectoryServices.plist dscl . passwd /Users/SHORTNAMEGOESHERE newpasswordhere Nice, but this doesn't work in 10.7 Lion. In addition, you are prevented from changing the root password in single-user mode. Do this in 10.7 Lion; boot into single-user mode and type: Code: mount -uw / launchctl load /System/Library/LaunchDaemons/com.apple.opendirectoryd.plist ^ after typing this, you may now use 'passwd root' to change the root password Now you can continue reseting the user's password: Code: dscl . passwd /Users/bob bobsnewpassword ** You may see an error message that states com.apple.DirectoryServices.plist cannot be found; ignore this in Lion.