Yup, just set a firmware password. http://www.chriswrites.com/2012/02/how-to-set-the-firmware-password-in-mac-os-x/ http://www.chriswrites.com/2012/02/how-to-s

Yup, just set a firmware password. http://www.chriswrites.com/2012/02/how-to-set-the-firmware-password-in-mac-os-x/ http://www.chriswrites.com/2012/02/how-to-set-the-firmware-p...