i was working on macOS, and I had to:

1 - download/install the IDE
2 - download/install the FTDI USB drivers
3 - no problems connecting the board or 
    uploading code (blinking LED example)
4 - had to download most recent nightly build 
    of PD (necessary for "import mapping" in 
    Dave's arduino_test file)
5 - upload the pduino firmware to arduino
6 - had a little trouble getting PD to read from 
    the correct port - just had trouble specifying 
    name of port since it had a special char in it 
    (!!) - port name is /dev/tty.usbserial...
    <special char>..., so i had to make a symlink to 
    this file without a special char, then use 
    "devicename /dev/tty.newname" and "close" and 
    "open 1" (or "open 2/3/4") to get the arduino test 
    patch reading from the analog inputs of the arduino

success! 

-Anita