A system is only as secure as its user base is careful. Remember those old VBS trojans? Here's a Mac version using AppleScript.
A new Trojan horse, created just for Mac OS X , has been discovered in the wild.
Earlier this week, Macworld UK reported that one of its readers downloaded from LimeWire what looked to be an installer for a demo version of Microsoft Word 2004 for Macintosh , part of Microsoft's soon-to-be-released Office 2004. However, when the reader double-clicked the file, it erased everything in his home folder.
http://www.macnewsworld.com/story/33790.html