I really feel for all Software Developers when dealing with Apple. It wasn’t that long ago Steinberg re wrote Cubase for Carbon and then at the last minute Apple changed to cocoa, (or the other way round) had to re do the whole thing again!!
The amount of time and effort required to keep on top of Apple updates , just to keep standing still!
To put this into perspective you can still open windows XP apps on windows 8.
MC