There are 2 parts of the apps. There's model layer and view layer. The model layer is a pain to bring over because certain model objects (UIColor) are only on o

There are 2 parts of the apps. There's model layer and view layer. The model layer is a pain to bring over because certain model objects (UIColor) are only on one platform. So if they make changes to ease that then making a mac app will become way easier. The other problem is that AppKit is not as nice or as easy to use as UIKit in my experience. If they can bring these two frameworks together under shared functionality that would be great. For example, template Master-Detail from iPhone to iPad is great (and you can always customize). So having that extend to macOS would make mac development easier. I imagine this is what they are planning. The third idea is they are thinking of something greater yet separate that is not meant for existing apps. Like a new UI Framework that works on both. This seems hard to believe as they have the iOS app base and the goal is to bring that over to mac not start a new app base altogether.