A Mac Virus is a small bit of executable code that spreads when users open infected files or applications. There are two known viruses that affect Mac OS X. While both of these are found in the wild, neither are widespread. Although Mac viruses do not affect Windows computers, Mac computers can act as an asymptomatic carrier, inadvertently allowing users to pass infected files on to Windows users.
- One Mac virus is named "OSX.MachArena.A" (a standard virus), and the other is "OSX/Oomp-A" or "Leap.A," which combines the techniques of Trojan Horses, viruses and worms.