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I Forgot My Mac Computer Password, What Do I Do?

"I forgot my Mac computer password, what should I do? I installed dual system on my Mac computer. I’ve been using Windows instead of Mac OS X for a long time. Today I started Mac OS X, but found I forgot the login password. What can I Do?"

Take it easy if you forgot Mac computer password for login to Mac OS. Here introduce how to reset Mac computer password after forgot it.

What do you do when forgot Mac computer password?

Method 1: Reset forgotten Mac computer password with Mac OS installation disk

Step 1: Connect a Mac OS installation disk to your password forgotten Mac computer.
Step 2: Boot Mac OS from the installation disk.
Step 3: Once Mac OS boots up from the disk you need to choose your language. Then Mac OS will prepare the installation environment.

Mac OS installation environment
Step 4: Then select the Utilities menu and select Reset Password.

Select Reset Password
Step 5: Select the volume containing the user account whose password you forgot, and select the user account from the drop down button. Then type your new password and then click on the Save button to save changes.

Reset a new password

After forgotten Mac OS password is reset to a new one, restart your Mac computer and boot Mac OS. Then you can log onto Mac OS with the newly reset password.

Method 2: Reset Mac Computer forgotten Mac OS password in Single-User Mode

Step 1: Start or restart your Mac computer while holding the Command + S key. This will open up Terminal in Single-User mode.
Step 2: Once access to Single-User mode, you can see the command line input port that starts with root. (If you can’t see that, press Enter key twice.) When you see root#, run the following commands one by one.
fsck -y
mount –uaw /
rm /var/db/.AppleSetupDone
reboot

Step 3: Then your Mac computer will reboot, and it will display the Mac Startup screen.
Step 4: Follow the steps on the screen to create a new admin account on the Mac computer.
Step 5: When you are logged in the newly created admin account, you can go to System Preferences -> Accounts. Then select the password forgotten account and click on the Reset Password button.

Click on the Reset Password button

Step 6: Type your new password and password hint if you desire. Then click on the Reset Password button.

Type your new password

So, you have successfully reset your forgotten Mac computer password to a new one. Now you can logout the newly created admin account and login your original password forgotten account with the newly reset password.

In addition: If your Mac computer is with dual system installed and you forgot Windows 7 admin password or forgot Windows 8 password on your Mac computer, it should be also simple to reset Windows password on Mac computer.