I don't know my MacBook Pro password! Help!

• Hold “Option” at boot and select the “Recovery” disk at the boot menu
• Wait for “Mac OS X Utilities” menu to appear, indicating that you are booted into recovery mode
• Click on the “Utilities” menu and select “Terminal”

• Type the following:

resetpassword

• Confirm the user account and then the password change and reboot Mac OS X 10.7 as usual with your new password

This replaces the “Reset Password” menu item that used to be in place prior to OS X 10.7, which was one of two original methods of resetting a Mac OS X 10.6 or prior password. Why the change to the Terminal method? Probably for increased security now that recovery partitions are standard with Lion.