The IDE seems to know that I connected a Mega 2560
Is there another driver that I am not thinking of?
Tools>Port> "Serial Ports" is greyed out. For example, on my Macbook the only option available (pre-checked) is /dev/cu.Bluetooth-Incoming-Port". In Windows, Tools> "Port" is greyed out, nothing selected or selectable at all. I have this same result with the UNO and the MEGA2560 R3. I have had similar results in Windows 10, Mac OS 10.12, and Ubuntu, with Arduino 1.8.0 and 1.8.2. An image in Mac and in Windows is attached. Any help is appreciated!