I have often seen this mantra repeated, but I can't believe that this is enough to dissuade every single hacker. With Macs approaching 10% of the market this has got to be worth somebodies time to have a go. And yet, I know a lot of folks with Macs and not a single one has ever had malware issues. Either nobody is getting hit, or they are getting hit with stuff so good and stealthy that they just don't know it :-) I'm certainly not arguing that Macs are invulnerable (far from it), I'm just genuinely curious why somebody somewhere isn't stepping in to fill the malware niche.