This is a marketing thing. Macs have virus' and in fact Apple have been outed as the tech company with most vulnerabilities in their software this year.
Besides, if you truly wanted no virus' then you'd be running Linux.
Macs are overpriced, underspecced and can't do "video editing" any better than a PC. The whole "video editing" myth only comes about because Apple bundle the software to do it with their machines so the two get associated. In actuality it's cheaper to just get a higher specced PC with the same money.
I was disgusted when I found that a £2300 Mac Pro was worse than my £640 desktop from PCS. Who the heck buys these - it's utterly mind boggling. Actually I do know who buys them - computer ignorant 60 year olds lured in by the Apple store.
Bah, I'm ranting now. Apple goods make me lose all faith in humanity. Good lord, just because it's shiny, white and has a pretty aero effect it doesn't mean you have to buy it - you're not a firefly!
*shakes fist at sky*