Earlier quoted context omitted.
I can't help but think this is more a result of low volume and extremely tight control over their ecosystem rather than an intentionally prioritizing on security.
The MacOS X ecosystem is 25 years old now, counting NextStep, and has an installed base of close to a hundred million systems, most of them unsophisticated personal computer users running a full Unix operating system with internet access. That is a prime target, considering there are malicious exploits that take advantage of Z-series mainframes in recent years. (one of the Pirate Bay founders got popped for looting t…
Second, retail-level malware is a numbers game. Malware isn't cross-platform. A malware author chooses their target based on how remunerative the target is. Windows remains more remunerative than OS X.
There is no fundamental difference between the security models of modern Windows and OS X that accounts for the disparity in malware infections.
(I'm a Mac user, and have been since ~2001.)