It has often been said that Apple computers weren’t susceptible to a virus. In fact, that was one of the shining gems that they were known for. Well, perhaps it’s time to think again. It was just reported that more than 600,000 Macs are, in fact, infected with a virus known as the Flashback Trojan. According to bgr.com, Russian anti-virus vendor Dr. Web has discovered that a vicious malware known as “BackDoor.Flashback,39” is currently present on at least 600,000 Mac computers.