I have a used powerbook g4, and forgot the admin password. help

Use the install CD for the PowerBook and change the password

Allan

You need the CD

Restart the Mac holding down the Command+S keys, this will take you into Single User Mode and it’s Terminal interface

You’ll need to check the filesystem first:

fsck -fy

Next, you must mount the root drive as writeable so that changes will save:

mount -uw /

Now, type the following command exactly, followed by the enter key:

rm /var/db/.applesetupdone

After removing the applesetupdone file, you need to reboot, type ‘reboot’ and hit enter

Stage 2) Create a New User Account upon System Boot

You aren’t finished, but the hard part is now over – no more command lines, you’ll now be in the familiar Mac OS X GUI to finish the password reset process. In this step we just create a new user account as if you just got a new Mac:

Upon reboot, you will be presented with the traditional “Welcome Wizard” startup screen just like when you first get a Mac

Follow the welcome wizard and create a new user account – making the account name different from the account whose password you want to recover

Continue on and boot into Mac OS X with this newly created user account, this new user account is an Administrator and has administrative access

Stage 3) Reset the Forgot Password via System Preferences

You are almost done, now you just need to reset the forgotten user account password using the Accounts control panel:

Once you are booted into Mac OS X, click on the Apple logo and then navigate down to “System Preferences”

Click on the “Accounts” icon in System Preferences

Click on the Lock icon in the lower left corner of the “Accounts” preference window and enter the newly created user credentials, this enables you to change other user accounts and reset other users passwords

On the left side user panel, select the user account containing the forgotten password

With the user of the forgotten password account selected, click on the “Reset Password” button

Enter a new password for that user, be sure to include a meaningful hint so you don’t forget it again!

Close System Preferences and reboot the Mac

You can now login to the previously inaccessible user account using the newly reset password! All user files and settings are maintained as before the password was forgotten

Optional: If you’d like, you can delete the temporary account you created to reset the users password. This is wise for security purposes.

Here’s how this works: by deleting the .applesetupdone file, you are telling Mac OS X to re-run the setup wizard, which by default creates a new user account with Administrative abilities, which can then reset the forgotten password of any other user on the Mac. This is a great trick and excellent troubleshooting technique if you don’t have a Mac OS X installer CD/DVD laying around, which is pretty much the norm as many people tend to lose or misplace the installer disks that come with their computers. I have used this exact method multiple times to restore various Macs with forgotten/lost passwords.

Reset Mac Password – with the installer CD/DVD

Resetting a forgotten Mac password is easier if you have an installer disk handy, we have covered this tip before on it’s own:

Boot from the Mac OS X installer disk by inserting it into the Mac and holding down the “C” key on boot

Select your language preferences and then under the “Utilities” menu select “Password Reset” (it may say “Reset Password” instead, depends on the version of Mac OS X)

Select the hard disk that the forgotten password is on, then select the username of the forgotten password, you’ll then be asked to select a new password

Reboot as usual from the hard drive, using your newly reset password as the login!

This is borrowed from our article on how to reset a lost password with a CD. This is obviously an easier method but it’s of no help if you own a MacBook Air with no DVD drive, or if you just don’t have the installer Mac OS CD laying around. If you’re in that situation, the best alternative is to use the above method that does not require a CD to reset the password.

Wow! This really helped me

THank you