Here goes most secure os listing…
#3 Apple OS X
The Symantec Internet security threat report offers analysis and discussion of threat activity over a six-month period. It covers Internet attacks, vulnerabilities, malicious code, phishing, spam and security risks as well as future trends.
Sun Solaris and HP-UX listed at last position. My personal experience shows that both Linux and BSD offer superior security. I’m just wondering what if they consider OpenBSD next time ;)
From the article:
Microsoft is frequently dinged for having insecure products, with security holes and vulnerabilities. But Symantec , no friend of Microsoft, said in its latest research report that when it comes to widely-used operating systems, Microsoft is doing better overall than its leading commercial competitors.
The report is available here.