A Sophos researcher stirred up the Mac masses this week when he
reported that 20 percent of Mac computers carry Windows malware.
The good news is that even though Macs are capable of harboring
Windows-targeting viruses and Trojans, those machines can't be
harmed by the malware in all but exceptional cases. The bad
news, though, is that Mac users can still spread that malware to
Windows machines in a number of ways. Sophos senior technology
consultant Graham Cluley reported earlier this week on a Sophos
study that found that one in five Macs carries one or more
instances of Windows malware and that one in 36 Macs are
infected with Mac malware. Some critics of Cluley's article have
taken issue with his view that "although most of the malware
we're currently seeing on Macs is designed to infect Windows,
you should still be a responsible member of society and ensure
that you're keeping your Mac squeaky clean." Again, Windows
malware won't hurt a Mac, but a Mac user can inadvertently pass
along that malware to a c