Resolved Roommate keeps hacking my mac...any ideas?!

DVD9

macrumors 6502a
Feb 18, 2010
735
421
My roommate keeps creating his own administrator account on my mac using this method:

http://osxdaily.com/2010/08/10/forgot-mac-password-how-to-reset-mac-password/

I tried changing the permissions on the .applesetupdone file. Short of locking away my computer all of the time, any ideas on how to protect from this?! I can't believe it is this easy to get past password protection.

Thanks!
Try Filevault2.

If your roommate can get around that please do let us know.