Changing the password on your MacBook is an essential step in maintaining your cyber security. Here's a simple guide on how to change your password on a MacBook:

1. Click on the Apple menu in the top left corner of your screen.
2. Select 'System Preferences' from the dropdown menu.
3. Click on 'Users & Groups'.
4. Click the lock icon at the bottom left corner and enter your current password.
5. Select your username from the list of users.
6. Click 'Change Password'.
7. Enter your old password, then create and verify your new password.
8. You can add a password hint to assist you in remembering your new password.
9. Click 'Change Password' to save the new password.

It's important to choose a strong and unique password to protect your data from potential cyber threats. Make sure your new password is complex and not easily guessable.