If all you need is 3D software, yeah, plenty of good Mac 3D software. Pick a couple (you'll need more than one). You'll be happy.
But here's the thing. Thanks to Fusion and Desktop, Max IS a Mac application. So is XSi, and all those other things that you THOUGHT were PC-only. These apps live in the dock, are archived via Time Machine, output searchable in Spotlight...Seriously, all that's left are keyboard shortcuts and window dressing. If you can learn 3D software, you can learn to cope with the control key and the absence of 3 colored dots in the upper left.
I could go on about the reasons why Mac is the just about the LEAST preferred platform for 3D development, but it really is beside the point. The real point is, stop complaining. Stop waiting for developers to do what they don't NEED to do. Hunt down people from VMware and Parallels and buy them drinks. Name your children after them. Thanks to a wise choice by Apple (hey, buy THEM drinks too), you can now do the impossible -- run MORE software on your Mac, in a completely integrated fashion -- than any PC user will ever have available.
Sorry for the rant.
But here's part 2.
Buy the box of Windows. It won't hurt your Mac. It won't make you hate children and bunnies. Your hair won't fall out. You won't start liking the New York Yankees. You're 2 pieces of software away from what you want.
And certainly if you NEED Max or other 3D software on your Mac, no excuses.
Okay, rant part 2 is ended. Seriously, poke around here. You'll find plenty of creative and technical pros who are doing this. It works.
Oops. Third rant sneaking in. **I** feel better anyway, and that's what counts.