I found a news at OS X HAX you could be interested. i'll give you a copy'n'paste:
This is extremely good news! It means that if you install the MacOS X driver, you'll wind up with a /dev/tty.usbserial-mumble device. There are perl scripts that can talk to this device to run the XMPCR from the command line. Huzzah!

In reply to Re: OS X USB input by oha
in thread OS X USB input by puran_bair

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