[deks]

Researcher cracks Mac in 10 seconds at PWN2OWN, wins $5k

http://www.computerworld.com/s/article/9129978/Researcher_cracks_Mac_in_10_seconds_at_PWN2OWN_wins_5k

[central_va]

As a system admin for Unix servers for many years you can make them invulnerable. It takes initiative but it is easy. OTH no matter what you do to a Windows box it will have vulnerabilities.

Without root authority there is very little damage that can be done to the UNIX OS. The virus concept doesn't apply to UNIX.