The stuff will work anyways in Poser 5 and newer. The problem might be the thumbnails in the library. If there is only an rsr-file you'll get the shrugging guy instead of the pic, but if there are png's the stuff will work as it is. Then the paths to the textures and obj-files might be Windows-style like "C:somefoldersomeotherfolder...." which usually works on my computer but it takes a long time to load. There are some converters that work on OSX. There is one in the marketplace by fmorgan that I know of and I've found a free one in the DAZ forums (it doesn't work on everything though).