The Mac OS vulnerability relates to user login passwords that are stored in the system memory even if the computer is locked or put into a sleep mode. Passware’s software captures live Mac computer memory over FireWire and analyzes it, extracting these passwords, a process that the company says takes just a few minutes–regardless of password strength and use of a FileVault encryption.
While this is an issue, once physical security has been breached, it is game over anyways.