Best *Mac* Antivirus program? (just to keep from infecting PC's...)

[Racer X]

AND, if it is proven that I, as a contractor, infected the company network through my not having current anti-virus software on my machines used for my work their, either my own, or ones supplied by them, I am required to pay for the recovery effort.

So yeah, just because you can't catch a terminal disease doesn't mean you shouldn't practice good hygiene.