This post was published more than a few years ago (on 2005-07-08) and may contain inaccurate technical information, outmoded thoughts, or cringe takes. Proceed at your own risk.
No, they haven't released TiVo To Go for the Mac (and it's looking less and less likely as the years pass), but I did find this great article on How to decrypt .tivo files on OS X (a pragmatic approach). It does require Virtual PC, yes, but looks to be a good guide on how to easily get yourself up and running with MPEGs from your TiVo on your Mac. I'll report back once I've actually tried it, and have a working path for burning DVDs with said MPEGs, and how to edit out things like commercials before the burn.