We haven't responded because we were all working hard to release a major update for the PC version. We will update the Mac version but have to navigate through a more difficult Apple update path.
.... Which begs the question on why the Apple App Store was chosen as a medium to distribute?. I'm no expert on marketing etc... but if it was on Steam in sync with the Windows version (for the same price and available as a multiplatform purchase) then surely you'd attract the Mac OS market share, just as Laminar Research did with X-Plane (and it's something like 30% of their userbase). I think the mistake is that you're treating Mac users differently, and LR don't.