No, there's no such thing as a free MacOS, any more than
there is a free Windows. And MacOS only runs on Apple
there is a kind of free Windows, though, i mean WINE.
i don't know if it is possible to run py2exe in wine to produce a bundle
with dlls that'd then work in the microsoft versions, perhaps (at least
using the ms dlls i guess, but then it would not be the fully free wine
anymore ..) and i have no idea how things go with sdl & opengl there.
seems that py2exe not working in wine is a reported bug in the wine tracker, http://bugs.winehq.org/show_bug.cgi?id=3591 and there are some details
about the probs (incomplete win implementation in some parts of wine).
so it seems nothing in principle is stopping it.
i have quite regularily had to use a win box just to run py2exe on some
pygame apps otherwise developed on linux, so would not mind getting
deployment more straightforward .. especially if some of those apps
really start getting more widely used & dev needs more demanding.
perhaps should check that linux macmillan tool some day.