Usb Garmins And Macs. It Actually Works Now.. in GPS technology and devices Posted December 31, 2005 VPC why? We've been using the keyspan adapter without VPC to connect our Rino 130 to the Powerbook and to the desktop G4. TOPO, MacGPS Pro and Route 66 all work without need of VPC. MacOSX only necessary. MagicTogether Because I pefer to use Mapsource for waypoint management. Also to update maps when the time comes. Somethign you can't do in OSX without VPC. Not to mention Garmin's automatic updater for the Streetpilot is really sweet. Just plug in your GPS and it finds everything that needs updated. Voice, firmware, map updates, etc.