Arbitrary code execution is arbitrary code execution.
Please provide a list of the self-replicating, self-transmitting, self-installing computer viruses or worms that are in the wild for the Apple OSX operating system... by that I am referring to actual exploited, dangerous computer virus or worms, not proof-of-concept demonstration code seen only in a computer lab one-day-wonders, or the physical "a hacker must be present for it to work contest break-in exploits", nor a list of theoretical vulnerabilities... but an actual, working, computer virus that is a threat to other OSX computers exposed to the wild.
Social engineering Trojans, that require the participation of stupid or greedy users, need not apply.