Forget the password on your mac? – resetting the password on your mac
There are a few ways of resetting the password on your mac, the ways that I do know of are:
- From page 31 of the “Welcome to Mac OS X” booklet:
If you forget your password for your computer, insert the Mac OS X CD and restart your computer while holding down the C key on the keyboard. When the Installer appears, choose Reset Password from the Installer menu and follow the onscreen instructions.
Tip: Resetting an account password doesn’t affect other kinds of passwords that might be forgotten, such as your email account password, .Mac password, secure server passwords, Internet access password (if you have one), Keychain passwords, or Mac OS X 10.3 Panther’s master password.
Resetting an Administrator Password
If you have forgotten the Administrator password or you can’t log into your Mac at all, you will need to use the Mac OS X Install Disc.
Enter the Mac OS X Install Disc that is the closest version to that running on the Mac. For example, if you are running Mac OS X 10.4 Tiger, you should enter the Tiger install disk, not any earlier ones. Restart the computer, and hold the C key as it starts up. This might take longer than usual, and you can release the C key as soon as the Apple logo appears on the screen. When the window appears, choose your language and click the right arrow.

The next step depends on what version of Mac OS X you are using. For Tiger (10.4), choose Reset Password from the Utilities menu. For earlier versions, choose Reset Password from the Installer menu.
Choose your Hard Drive from the top and then choose the Account from the drop down menu. Be careful not to select System Administrator, as this is actually the root user, not the administrator account on your Mac. Now enter the new password, click Save, quit the Installer and restart the computer.
Note that there are a few issues with this method. Firstly, it does not reset your keychain password. You will have to do this separately. Secondly, do not attempt this if you have FileVault enabled. To reset an FileVault protected account, you need the master password.
- This second method is tricky you might have to do it a few times to enter the syntax exactly correct (i am not a mac person so it took me around 45 minutes of trying)
HOWTO: Reset a lost OS X password
I’ve you’ve forgotten your Mac’s admin account password, don’t worry. Assuming you haven’t locked out OpenFirmware, it’s a pretty simple task to change your password back to something you know.
Here’s how:
- Hold Apple+S when booting to enter single user mode
- #sh /etc/rc
- #passwd yourusername
- #reboot
If you can’t recall your user name, you can either look in the /Users folder (the directories are named by user), or run “niutil -list . /users”.
Also, on older systems the /etc/rc script isn’t available, apparently. If that second step fails, try mounting and starting the base services manually:
- #/sbin/fsck -y
- #/sbin/mount -uw /
- #/sbin/SystemStarter
I’ve had to do this a couple of times for friends when they’ve bought a second hand machine, and once when I had a momentary brain lapse and forgot my own password. Works like a charm, though you’ll loose any passwords stored in your key chain.











