I have a MacBook I usually bring to work. My co-workers and michevious and always try to change my background, etc. I leave on my screensaver password. I close the lid to my laptop to initiate the password protect. So last night I came back from lunch, open up my MacBook and my co-worker comes next to me, it seems like she put a code, and then unlocked my MacBook. It's either 1.) She know's my password or 2.) there's a bypass code because she typed something and it unlocked. Anyone know how to hack it?