I did a Google for the string "convert DSS Macintosh" and found a 2004 product from Olympus (http://www.versiontracker.com/dyn/moreinfo/macosx/13575&vid=169016) and a product called Switch Sound Converter, from, of all people, NCH.
Umm, okay, I have to ask the question: Do these products not do the job? I mean, it took all of 20 seconds to find them, and this is an NCH forum....