I just installed 3150 and plugged my GPSMap 60C in. It's recognized and I am able to upload AND download all data including maps, waypoints, tracks, and routes successfully. Here's the nitty gritty: GPSMap 60C - Firmware 4.10 MapSource - MetroGuide North America 6.11.3 Garmin USB Drivers - 188.8.131.52 Parallels - Build 3150 Windows XP SP2 MacBook Pro (Core Duo) 17" Here's a huge thank you to the Parallels team. I can now shut down the Windows box for good. You all rock!!!!!!