You could explain it like that, but that's not what erwin meant to say.
What he really meant to say is that the we DO NOT use standard windows functions like directshow etc in DVD2one.

Instantcopy uses directshow to decode the vob's, and DVD2one does everything by itself completely independend of the OS.

But building the MAC version was just a bit more work then you expect. It's not a question of recompiling and DONE..

(but then again, as we say in the Netherlands, the best captains are always on the shore.)