Hey guys, I'm new to the forum and new to using a GPS. I'm also not very computer literate so please bare with me. I just bought a Garmin 64st. I've downloaded Basecamp, Mapinstall, map manager. None of this process has really gone the way the tutorial said it would. At any rate, I'm trying to put maps from this website onto an SD card for my GPS. I use a Mac. I downloaded one from the website, clicked on it after the download and it loaded into MapManager. From there, I don't know how to get it to Mapinstall. Map Install is showing my SD card but nothing appears on it.