Wikipedia
MacSweeper
MacSweeper is a rogue application that misleads users by exaggerating reports about spyware, adware or viruses on their computer. It is the first known "rogue" application for the Mac OS X operating system. The software was discovered by F-Secure, a Finland-based computer security software company on January 17, 2008.
, the official website for the application, macsweeper.com, is offline, although the home page for KiVVi Software can still be accessed.