Can't see my Micro

Just bought a Micro from RadioShack. Plugged it in. As soon as I connected the board to my Mac, a blue led lit and a small green led on the other side of the board started flashing.- flash, flash, long flash, repeat. Ran Arduino SW. Selected Micro from Board menu. Opened Blink. Compiled. Tried to upload. Got an error message saying it couldn't find a Leonardo!!! Why is it looking for a Leonardo? Why can it not see my Micro? Tried RESET button on the board. Green led briefly flashes with a slower, even rhythm; then resumed the rhythm above. No help. Any help would be appreciated by this complete beginner, Ralph

I realized I hadn't selected the serial port. Works like a charm now. Thanks, Ralph