For SOLIDWORKS files on macOS, you have pretty much two options. Dassault's own eDrawings standalone application (DL the app from their website and not the buggy MAS version) is IMO the lesser of the two options. I'd use Autodesk's online
Autodesk Viewer, for which you'll need a no-cost account - Autodesk's cloud server viewer platform is pretty powerful IMO, and it does allow for viewing of uploaded SLDPRT files.