I don't suppose there's anyone in the community with knowledge of programming for Mac, and converting from PC?

I'm no programmer, so my information is limited... but depending on what language was used to create the program, there are ways to port it to the Mac that are much less complicated than they once were. Particularly with OSX being UNIX based, and its compatibility with Java based programs and applets. (There's more info on Apple's website, if you're at all interested.)

If there is someone who could somehow collaborate with you on creating a Mac version of the texture converter, I'm sure the Mac users in the Poser community would make it worth the effort. I can't speak for everyone else of course, but I would be willing to pay a bit extra if it was necessary to cover the additional development. I've been involved in the Mac industry on a professional level in the past, and I'd be happy to see what information I can find out if it would make the process any more appealing to you. :)

I realize its not an easy process to consider, but companies like DAZ have been supporting both platforms for Poser (such as their Morph INJ Program) successfully for quite some time and may have some insight to offer.

Best regards,
Molly