Same Problem like Luke, but if i choose the highest Number on my Macintosh the problem doesn't leave
usbutil: unable to find a device matching 0451:f432
https://github.com/energia/Energia/wiki/Getting-Started#selecting-the-serial-port
this link said that i need an usb port who's called dev/cu.uart. On energy there appears just dev/cu.usbmodem and dev/cu.bluetooth. What did i have to do for working.
gz