Hacking Apple Mac OS X is no easy task. Just ask security researcher Vincenzo Iozzo. Iozzo delivered a session on Mac OS X hacking at the Black Hat security conference, where he attempted to show how he had developed a new vulnerability that allows for a hacker to executes arbitrary code on Apple's OS X. But if anything, the effort demonstrated that Apple users don't have much to fear -- for now, at least. "The attack can only work if you already have access to the machine," Iozzo said during his presentation. "The attack is not a magic [wand] that...