[dman]

Completely agree with everything you said but the curiosity that drove my initial question still stands. To be specific do you think Sketch / OmniGraffle are unimplementable on Windows? Why would the creators of those apps after achieving such success on OSX, be unwilling/unable to address the windows market. I am convinced there are good rational reasons for this, I was hoping that someone from one of those companies could comment on this. [It is possible that in their target demographic everyone uses OSX, but is that the case?]

[Chazprime]

If the app is a native Cocoa application, it’s been written in Obj-C or Swift. Cross-platform apps and frameworks are usually written in C++ with a UI implemented in a common framework like Qt.

To port the application to Windows, you’d lose a lot of the Mac-specific features, or have to do a substantial amount of work implementing platform-specific UIs.