If you rely on the Apple app store, you have a single point of failure and have to jump through whatever hoops Apple decides. Which rather calls into question just how "indie" you really are.
BTW it is possible to sell Mac apps and not use the Mac app store (I do). But I sell for Windows as well.
BTW it is possible to sell Mac apps and not use the Mac app store (I do). But I sell for Windows as well.