I can not select a port.

Hi there,


  1. Can you find port number on Macintosh by following below commands, please?



    Open terminal and type: ls /dev/.

    Note the port number listed for /dev/tty.usbmodem
    or /dev/tty.usbserial*. The port number is represented with * here.


  2. do you select the correct boards and com port?
  3. please try to reboot the pc as well.