The writer of the article has no idea of the differences between OSX and Windows XP / Vista, that inherently make OSX more secure to begin with. And like most FUD spreaders, they fudge the facts to make their point.
Note that, so far, all of the supposed infections of OSX have been done by crippling the Mac so that it becomes possible to infect the OS, and usually done through a third party software hole. And note the source of most of the so called vulnerability scares: the companies that make virus protection software.
