The iPad Guy has also been known as the MaconMacGuy for a “good while now” – and sometimes gets asked about running antivirus software for the Mac.
In general, Macs are less susceptible to getting nailed with a true virus. HOWEVER – we have seen a couple of annoyances on Macs laptops, where the laptop owner visited a site that had been infected. The site ran some code that changed the homepage and search engine settings for the affected machine.
There have also been a few instances in the last several months of Mac attacks being seen “in the wild”. They are generally fairly arcane, but they are still “out there”.
So while the Macs are indeed less susceptible to virus attacks than WIndows machine, they are BY NO MEANS invulnerable.
Here’s an article with more info: