Bluetooth modules has two interfaces(RX and TX) that allow an asynchronous serial port that can communicate with a microcontroller. It also has a radio that communicates (in this case with your computer) using the bluetooth communication protocol.
How to configure Bluetooth Smirf's with mac's:
1. Connect the Bluetooth to the FTDI or to the arduino through RX and TX ( this way is just easy to give power to the bluetooth
2. On the MAC, go to bluetooth ( normally there is an icon on the top bar) and make sure that work computer is discoverable - that your bluetooth is on
3. Choose "Set up a Bluetooth device" > Any device. It will start searching!
4. Meanwhile ( depending on the kind of bluetooth smirf that u have) click on Passkey Options and choose " Do not use a passkey with this device" or if u have a passkey just entered it
5. Selected the device > Sparkfun-BT ( normally that's the name that appear's)
6. Click continue
7. It will establish the connection btw them. Close window
8. On the same bluetooth icon choose > Open bluetooth preferences
9. Click the Sparkfun-BT > Edit Serial ports in case that you want to rename
the port that you are using
10. Voila!!!
If you are sending data from arduino through Bluetooth to Processing to do something with that data just use the same methods and procedures that when using serial communication btw Arduino and Processing. Just choose the correct port, using the port that you created in the steps before and not the usb port.