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  Important notice for Mac OS X users:
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When you first plug the programmer board into your computer, Mac OS X will
probably bring up a window telling you that a new network interface has been
detected. This message will perpetually annoy you unless you go into the
Network System Preferences and click "Apply" to add the programmer board as a
network interface.

The reason it does this is because the programmer board identifies itself to
computers as a USB CDC class modem, which is basically a serial port simulated
over USB that doesn't require drivers in Mac OS X and Linux. The drawback of
this approach is that Mac OS X thinks it is a modem.