Setting a master password on your MacBook prevents others from logging in to your computer and protects your personal data from prying eyes. This extra layer of protection is especially useful if you plan to bring your laptop to class or work as it protects your system against unauthorized access by other wireless uses. Enabling, setting and changing the administrator password can be done using the "Users & Groups" pane of the System Preferences menu.

Reset a Master Password from System Preferences

Step 1

Launch "System Preferences" from the Apple menu and select "Users & Groups."

Step 2

Click the padlock icon if it appears locked and enter the current master password.

Step 3

Select the name of the user whose password you wish to change and then click "Reset Password" or "Change Password."

Step 4

Create a new password and enter it in both the "New Password" and "Verify" fields. Add an optional "Password Hint."

Step 5

Click "Reset Password" or "Change Password" to save.

Reset a Master Password Using Your Apple ID

Step 1

Enter the administrator password incorrectly three times from the login screen and then click the icon that looks like an arrow within a circle when you are presented with a message inviting you to reset it with your Apple ID.

Step 2

Enter your Apple ID and password and then click "Reset Password."

Step 3

Enter a new password and then enter it again in the "Verify" field. Create an optional password hint.

Step 4

Click "Reset Password" and then click "Continue Log In" to log in using your new password.