I have downloaded multiple maps onto my Mac from various locations, but this time I can't get a map to work. I download the file for Mac, and then I have the option to open with Garmin MapManager. I click to open with MapManager and a popup is shown that gives me the choice to install, but there is no map listed, it is just a white box. When I hit install, it immediately says it was successful but the map I want to install does not show up anywhere, because I don't think anything has actually happened. Does anyone have any remedies for this?