I have a Mac App that's mostly written in AppKit. Over time, I'm adding new views in SwiftUI, and all the while I've been using SwiftUI previews to preview both my new SwiftUI views, and my old App...

Is there any way for a Cocoa application to detect when the user has tried to quit it via its Dock menu, and not by some other method? Normally, it's possible to catch and respond to quit events us...

I have a Mac OS X application that implements the -(void)application openFiles: method to react to dragged files on the application icon. I have a list of allowed filetypes in the document types s...