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By Thurrott, Paul
Conventional wisdom has it that Apple’s Mac OS X system is more secure than Windows. And while partisans on either side of the OS fence have differing reasons for believing that to be so--Mac users believe it is because of the inherent superiority of OS X’s UNIX underpinnings, and Windows users claim that OS X’s tiny 5 percent usage share isn’t a sufficient target for hackers--this is perhaps the one area where they do agree.
Source: Win Super Site