I just upgraded from 10.6 to Mountain Lion. Prior to the upgrade I was using an Arduino and talking to it via /dev/tty.usbmodemmfa141. That device does not appear to exist anymore.
When I plug in the arduino via USB, the Mac should detect it and add /dev/tty.usbmodemXXXX for communication, but it does not. How can I force the Mac to see the Arduino or search for USB devices?