Hi, thanks for the URL, I checked both platform versions and they are bitwise identical - the difference is just the compression archive. If you set the file type to 3DMF (on Mac) it gets opened in QuickDraw's default browser window without problems, so it appears to be a valid file, but... If I import it to my Mac Poser, I first get a warning that it is "post version 1.1", then I get a series of "unknown tag" messages, and then it finally gives up with a "missing Geometries" error. It means that the Poser plug-in is simply restricted to an earlier QuickDraw3D version (on both Mac and PC), and I'm afraid there is nothing we could do about it, unless it gets updated to the recent version.