OK, they call it a virus, and then a worm in the first three paragraphs. Apple users may find worm Virus spread through instant messaging is the first to attack the Mac OS X platform. February 17, 2006: 5:51 AM EST SAN FRANCISCO (Reuters) - A malicious computer worm has been found that targets Apple Computer Inc.'s Mac OS X operating system, believed to be the first such virus aimed specifically at the Mac platform. The worm is called OSX/Leap-A, according to a posting on the Web site of antivirus software company Sophos, which said the worm is spread via instant messaging programs. The worm attempts to spread via Apple's (Research) iChat instant messaging program, which is compatible with America Online's popular AIM instant messaging program, according to the Sophos Web site. Link.