"Symantec notes, in its description of the Trojan, that the
threat of being infected by this malware is low. Still the mere
fact of its existence, and a botnet run by it, shows that the
claims of Mac folks that Macs are invulnerable to attack, are
simply false.
"If that news wasn't bad enough for Mac fans, the New York Times
reports that security researcher Dino A. Dai Zovi claims that Macs
are less secure than either Windows or Linux machines.
"It's no idle claim; Dai Zovi won the Pwn2Own hacking contest in
2007, and is author of the Mac Hacker's handbook."