Jason Snell, writing on Six Colors:
But there was another little slip that was very interesting to me. It probably means nothing, but when Maestri listed off Apple’s four major product platforms, he said this: “We’ve built a huge installed base around four platforms: iOS, Mac OS, watchOS, and tvOS.”
Officially, that second platform is still “OS X.” But calling it Mac OS instead sure fits better, doesn’t it?
If Apple continues calling their desktop operating system “OS X” after iOS 10 is announced, I’ll be shocked. I suspect OS X will receive a name change in the near future and will be referred to as “macOS” from that point forward.