I wanted to use the program/app duet to connect my computer to be able to draw on my iPad. Krita works with mouse in the iPad but it have a weird behavior with the Apple Pen. I really want to use iPad as a wacom drawing board to krita and I think it would be great if it could work.
It would be great but it needs a) someone with the right hardware and b) someone who has time to do testing and maybe coding. But the coding part is only maybe since Krita doesn't contain any specific code for handling tablets on OSX, so it's more likely that the duet driver simply doesn't send tablet events to Krita.
Until someone who can code, has the hardware and the will to implement this steps up, it's not going to happen. And if there's someone like that, they don't need a reminder in the bug database.