On a Mac, for example, this will be on the desktop. The Garmin should show up as a removable disc (like a USB stick) in the usual place.(On an eTrex, this is typically done by going to the menu screen, then Setup → Interface → USB Mass Storage.) Put your Garmin in USB Mass Storage mode.Connect your Garmin to your computer via a USB cable.
Assuming you have an SD card installed in the card socket for your Garmin, simply follow the Installing the map onto your GPS instruction below. img file is not meant for a program on your computer. Double-clicking tells your computer to “find the program that will understand. It sounds like you are trying to double-click, or otherwise open, an.
