This assumes you already have

• a 3.3v FTDI cable from AdaFruit
• modified the cable as per the AdaFruit tutorial.
• connected it to the OSX machine

To determine the device name:

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$ ls /dev/tty.*
/dev/tty.Bluetooth-Modem        /dev/tty.iphone-SerialPort1
/dev/tty.Bluetooth-PDA-Sync     /dev/tty.usbserial-FTF7VKP4

The device name starting with tty.usbserial is the one we are looking for.

To make a connection using screen at 152000 baud:

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screen /dev/tty.usbserial-FTF7VKP4 115200

You should now have a full-screen console. To exit, type ctrl-a ctrl-k. When you are asked Really kill this window [y/n] type y.