@Keith T
"Mac would be a terrible platform, because there could be so many unknown attacks coming at you."
Ah, so the many known, unpatched exploints on the Windows platform, plus the many unknown ones, make for a far more secure system? Really? A new model - security through insecurity?
Security researchers have been screaming about the Mac being an open platform for malware for years now - usually just before they launch an anti-virus product for mac. One that has no viruses and no trojans to scan for. You'd think, if it was so easy, someone somewhere would have written a dozen or two by now, but not even one has appeared.
"With Linux, well, contrary to what you think lots of Linux systems are broken into."
Yeah, right, sure, I believe you. Are you by any chance launching a linux-based anti-virus software product soon?