Apple renamed "Mac OS X" to simply "OS X" with Mountain Lion (2012)

Sources:

* http://en.wikipedia.org/wiki/OS_X
* http://www.macrumors.com/2012/02/16/apple-officially-drops-mac-name-from-os-x-mountain-lion/
* http://www.theverge.com/2012/2/16/2802281/apple-officially-renames-mac-os-x-to-os-x-drops-the-mac
Declare support for OS X Yosemite