you can build it yourself.
or use unofficial builds
Ok, so it builds fine...is there a reason there isn't an "official" build for it?
This doesn't answer the question at all, and if anything makes this all worse. If it builds just fine in 64 bit Mac, and there are both 32 and 64 builds on both Windows and Linux, why not on Mac? Is there an actual reason? Does Godot just not like Mac users? Does it really take that much longer to do a seventh build than it took to do the first six?