I am using Mac OS 10.5.8, Basecamp 3.0.2, and Garmin Mapinstall 2.1.6. Arizona Topo installed no problem on the Garmin GPSMAP 60cx, but is apparently not in Basecamp on my Mac. I have tried several times following the instructions in the tutorial, even uninstalling everything and starting from scratch without success. Am I doing something wrong? Any ideas?