New Apple Photos app contains ‘UXKit’ framework

Jason Snell, Six Colors:

For a while, iOS developers have complained that the UIKit framework they use to develop apps isn’t available on the Mac, making it harder to apply the same tools and techniques and code they build for iOS to Mac apps.

Today Apple dropped Photos for Mac via a developer release, and some developers are reporting signs that Apple has built this new app using something called UXKit, which sits above the Mac’s familiar AppKit frameworks and strongly resembles UIKit on iOS.

Right now it's a private framework.