That's BS. It hasn't been ignored; OS X has been a target for years. And the hackers have been making attempts. There have been substantial cash prizes offered for hackers who succeed in breaking into an OS X Mac. The acclaim and fame that would be given to a hacker from the cracker community for the first successful cracking of OS X's security would be pay enough for some of those who think they are super crackers.
The US Army now runs its website on OS X because of that hardness to hack.
Okay, man. OS X is inpenetrable. Whatever you say.
What does the REAL IT unit of the military use for most of their servers? BTW: That's the Air Force not the Army.