While a lot of the credit for Apple’s success is rightfully assigned to the iOS franchises, the OS X business has more than quadrupled in five years. This has happened without drastic price fluctuations. Neither holds for the overall PC industry which has seen both volume and sales decline while prices have eroded along with profitability. On top of that, growth has nearly evaporated.
Even with this success, as a percent of total value created, the Mac accounts for a mere 13% of Apple’s profit. Including software as part of the OS X franchise implies that OS X is enabling about 20% of Apple’s profits.
iOS, on the other hand, is accounting for more than 75%. These two platforms combined amount to 96% of Apple’s profits (up from 50% four years ago).