It used to be that MacOS was so slick and user friendly, and had the kind of software that Windows did not have, that it was worth botching around with to get it to work.

But that hasn't -really- held up. MacOS burned a lot of the "Creative" class that Steve Jobs used to market to early on. While there are still plenty of designers that use MacOS, the market is more fragmented now since the design tools are more Web-based and less Desktop-based. Audio tools have become more cross platform as well.