I doubt this will ever be available outside Apple as a framework
that’s meant to replace AppKit.
A thought that occurred to me: Wouldn’t an AppKit replacement wait until Swift was established as the primary language? In the big picture, looking at the next decade, it would make more sense for an AppKit successor to be designed Swift-first, as a primary goal, rather than making it UIKit-like as a primary goal.
So if this UXKit is not Swift-only, I don’t think it’s something we’ll see outside Apple. And given that Photos for Mac started life inside Apple long before Swift was announced, that’s unlikely, to say the least.
★ Friday, 6 February 2015