On the other hand, though, can a Mac get commandeered in the manner described?
The idea of botnet is new to me too, but I learned a bit more
at this site. I've poked around a bit, and I can't find any reference to a botnet or any other type of malware that uses Macs to send spam emails; the worst any Mac malware seems to be capable of is click-jacking, info-jacking, or holding your Mac for ransom.
Anybody?
Thanks.