I too find it odd how so many Mac users run the antivirus software called "it'll never happen".
That the main viruses for MacOS are proof of concept is NOT a good thing. It just means that the number of Macs isn't high enough (as a percentage of market) for anyone to bother writing something nasty.
Yes the system (UNIX) is inherently more secure, and inherently harder to damage than the single-user MSDos (and it's successors) thanks to the multi user foundation it's built on but that's inherently MORE secure, not inherently SECURE.
Dedee
Any time anyone involved in data security, DRM, encryption and so on says something is impossible you should be hearing dirty great big alarm bells ringing.
If it's impossible to abuse a system now it is nothing more than a matter of time until it's cracked.
RFID passports and ID cards were secure. Impossible to fake. No longer.
The most secure fingerprint scanners in the world can be beaten with some simple tricks, a scanner, some super glue and a few other bits of very simple trickery. All you need to do is use a glass in a bar.
Absolutely every "impossible" hack has been done in the past, and the current ones will be beaten too. It's just that simple.
For the time being, the operating systems which come from a network background (BSD, UNIX, Linux, etc) are far safer than Windows due to everything from sloppy coding at Microsoft to the inherently safer nature of their structure... remembering of course that MacOS is NOT open source so doesn't benefit to the same extent from distributed coding that some others do - but as the market share increases that will become more and more likely to change. As Windows becomes more secure, MacOS get a wider user base which will eventually bring it into the firing line.
That said - I wouldn't run Norton on ANY computer. There's much better and less bloated security software out there.