Arduino Diecimila, Arduino 0009 and OS X

I'm trying to get my Diecimila board communicating with my OS X system and don't seem to be having any luck.

I first tried just loading the usb driver that came with Arduino 0009, rebooting, plugging in the Diecimila and launching Arduino 009. Unfortunately, the usb serial driver wasn't listed under Tools -> Serial Port.

So I looked through the boards and found the posting at, followed the instructions to re-install and still the usb serial driver wasn't listed.

So now I'm stuck. I'm not sure what I need to do in order to debug this and get the board talking with my system. Any suggestions?


  • Peter

There is a slightly newer version of the drivers on the FTDI website: You might try uninstalling the ones that came with Arduino and installing those.

What version of OS X do you have? Intel or PPC Mac? In the System Profiler, when the board is connected do you see FT232RL USB UART under USB? If you open a Terminal and do:

ls /dev/tty.*

What do you see?

I've tried the latest FTDI drivers, version 2.2.7 and have the same results.

I'm running on an Intel MacBook Pro w/ 2GB memory, 120GB disk and OS X 10.4.10.

System profiler shows:


Version: 6.00 Bus Power (mA): 500 Speed: Up to 12 Mb/sec Manufacturer: FTDI Product ID: 0x6001 Serial Number: A4001tot Vendor ID: 0x0403

And /dev/tty.* shows:

/dev/tty.Bluetooth-Modem /dev/tty.Bluetooth-PDA-Sync /dev/tty.Peter-1 /dev/tty.usbserial-A4001tot

As you can see, there's now a tty.usbserial entry under /dev/. This wasn't there last night when I was trying to get the communications working. I'm a bit confused.

But I did just upload the Blink example sketch and its running on the board now. Wahoo!

  • Peter