Oh really?
INIT-29-B virus, HyperCard HC-9507, Hong Kong virus, OSX/Leap-A, OSX.Macarena, AppleScript.THT, OSX.Lamzev.A and OSX.TrojanKit.Malez, OSX.RSPlug.D, OSX.Iservice and OSX.Iservice.B, OSX/HellRTS,BackDoor.Flashback.3 and OSX/Pintsized.A all would like to have a word with you.
(BackDoor.Flashback.3 at one point infected over 600,000 Mac systems, OSX/Pintsized.A creates an open SSH connection from your Mac. Just to name some of the more recent fun things to happen with unsecured Mac systems.)