Mac malware has been making lots of news recently, and much of the analysis has focused on Mac's market share, which in the USA, is around 15%. But market share is only a single data point. Is that the whole story?
We don't think so.
Mac malware is hot right now because of the infection vector — Google Images Search. Mac market share (15%) multiplied by infection vector (Google Search Engine Optimization poisoning) equals a huge economic incentive to target Mac users.
What happens when Google fixes their Images SEO problem? The bubble will burst and the boom will bust.