"Apple made an iTunes version for Windows, Microsoft made Office for Mac. if those two could work past their differences for the sake of serving their customers, anyone can."
I understand what you're trying to say, but MS Office was first released for Mac (1989), then for Windows (1990). MS Word was released for Mac in 1984, later for Windows (1989).
Even before the Mac was released, Microsoft made products for Apple, like Applesoft BASIC and the Microsoft SoftCard.