...whole truth. Most of the Mac-specific viruses that do exist are effectively obsolete, along with the many legitimateapplications that are not able to run on the latest hardware and operating system combinations. The few examples of replicating...
http://www.computerweekly.com/Articles/2008/07/08/231396/macs-and-malware.htm
...TrendMicro reported that it found a new variant of the JAHLAV family of Trojans that pose as pirated versions of legitimateapplications, modify a computer's domain name system (DNS) settings and enabling successful phishing attacks and redirects...
http://news.cnet.com/8301-27080_3-10318943-245.html
The SANS Institute, offering computer security training for system administrators, computer security professionals, and network administrators, is a cooperative research and education organization that has many consensus projects to return computer security information to the community.
https://www.sans.org/top20/