Earlier quoted context omitted.
Incorrect.
Last time I checked it's close to 50/50, with Windows progressively losing share among devs: http://www.geekwire.com/2016/mac-overtakes-linux-as-develope... So my comment should be correct in a year or two, hopefully.
Look again at that graph:
http://stackoverflow.com/research/developer-survey-2016#tech...
OS X is treated as a single category, but Windows is split over multiple versions. When you add up all the Windows versions, OS X isn't close to 50% market share.
Also, I'd question why it should be 'hopefully' correct. Other than better support for Unix command line tools, what gives OS X the edge over Windows 10 as a dev environment?