@dadederk I was speaking mostly from personal experience and also from talking to some indie developers who create apps for iOS and MacOS using catalyst and other techniques, and they told me how they often have to implement proper focus tracking when using controls with the keyboard, whereas native AppKit controls like tables and lists etc. give developers all that for free. And when you compare that to an iPad with a keyboard, keyboard focus tracking is virtually non-existent. So if you want it there, with all events and VoiceOver tracking the active element, you also have to do some heavy lifting, which then may or may not translate to the Mac Catalyst version. So this is quite a broad field still. But from usage, I immediately know whether the Mac app I'm using is native AppKit or Catalyst.