On April 4, Russian antivirus vendor Dr. Web published strong evidence that more than 500,000 Macs have been infected by the latest variant of the Flashback trojan. As Mikko Hypponen, Chief Researcher at F-Secure pointed out via Twitter, if there are roughly 45 million Macs out there, Flashback would now have infected more than 1 percent of them, making Flashback roughly as common for Mac as Conficker was for Windows. Flashback appears to be the most widespread Mac malware we’ve seen since the days when viruses were spread on infected floppy disks; it could be the single most significant malware infection to ever hit the Mac community. — What You Need to Know About the Flashback Trojan
If you run a Mac, you should be aware of this. Mac’s generally have an easy life when it comes to threats from Malware, but they do exist. Follow the link in the article for instructions on how to check your system for infection, and how to reduce risk in future.