Found this while looking for a solution.....
Subject: Re: help importing viewpoint models into maya 3.5m
My understanding is that it's not possible. The only option is to get another package like Form-Z to translate the files. Sux, huh?
Maya on OSX is a red-headed step-child with only the bare esentials. I greatly regret moving my NT seat to OSX.
Which does suck.....I looked at Poly Trans which is an amazing tool....but it's for windows....IMHO, macs are great for the interface....but when it comes to the rest of reality.....it's a windows dominated market....which means right now anyone that buys a mac is wasting their time.
Sorry to be the bringer of bad news.....I tried and tried to get somethin for ya.....could be that I didn't look hard enough......but I doubt that.