Windows gets malware and crap on it without the appropriate counter-measure software,
OSX doesn't
Sounds like an OS problem to me.
No it does not.
Allowing code to run surreptitiously is the issue at hand. It's all operator error. Many of the systems that are infected have countermeasures in place in the form of anti virus, etc. Yet these people continue to use browsers that are extremely insecure an allow EVERYTHING to run wide open. To add insult to injury they are often logged in with accounts that have administrator privileges!
Experienced users don't have this problem. It's not OS related.
Just five years ago Windows users would be infected by opening attachments in emails OR downloading warez or going to porn sites.
Now getting infected is as easy as watching a youtube video, reading the new york times or listening to a radio station online. This is possible because the hosting servers for advertisements are often run on shoestring budgets and their servers are unpatched and vulnerable. If such an ad is served and your browser runs everything your computer will get infected.
When Fermi reviews came out last April many people reported that they could not read Anand's review because the site was flagged as an attack site. There was nothing wrong with anandtech.com, but one of the ads was running on a compromised server.
In this day and age I find it crazy that ANYONE would surf the web without at least some way to block scripts from running, block all adverts, and prevent flash from opening on its own. Just using adblock, noscript, and flashblock in firefox can stop nuisance drive by attacks. Common sense applies on the other things. Say someone sends you a video but it won't play. You get a DRM message telling you the content is protected and it looks official. Inside the player is a button that you click and it opens a save as dialogue. It's an exe file and anyone knows this is not good. If you have malwarebytes you can scan it and more than likely it has something nasty like a trojan or root kit. People open them every day to see some silly crap. Most of the time it's young males thinking with their dick.
Blaming this on the OS is like blaming Ford for a faulty car because your foot slipped off the clutch and you ran over the neighbor's cat. :biggrin: