"... The traditional Windows-centric method of hackers to gain control is via a mass-mailed worm, but even with its increasing popularity, that's not a likely avenue of attack on the Mac."I don't expect to see a worm attack," Reynolds said. "The Macintosh still has far too low of a profile."
Even if, as Gartner estimates, the Mac has about a 3 percent market share, that means any Mac worm wouldn't spread 97 percent of the time. "A hybrid worm targeting both the Mac OS and Microsoft Windows could be developed, but such an attack would be difficult to orchestrate," he added.
But he doesn't say how a mass e-mailed worm would infect a Macintosh which does not allow executables to be installed without a password, or allow them to run from e-mail. For a mass emailed worm to work, it has to be installed and executed. How likely is that? Somewhere between zero and none.