xbee communication on OSX

I am trying to find out how and with which program for OSX (10.5.8) I can configure serial ports. I am trying to establish a wireless connection between the two Xbee´s (RF modules) and cannot figure out how to use ZTerm nor screen under Terminal. The setup I am using is: an Arduino+Xbeeshield+Xbee with external power supply, and an xbee on the xbee explorer connected to the Computer via USB. I am trying to gather information on this through various forums, but most of them cover the configuration issue for PC using X-CTU (which I tried with CrossOver but it doesn´t recognize ny of my ports). According to one source, using screen under Terminal should show me all my serial ports, particularly /dev/tty.KeySerial1 - but it doesn´t show, even though I´ve plugged in both my arduino+xbee shield and the xbee on the explorer.

Can you help me?

Also, Ive read a few times that I need to update the firmware… of what? Of the explorer or the xbees? And how would I do that? I´ve downloaded the FTDI-USB-Serial driver from ftdichip.com but don´t know what it did after installing…

Your OSX question should be directed to a forum for OSX folks. Less likely you’ll find someone here.

Which XBee hardware do you have? Series 1 or 2?

Series 1, any firmware, will do wireless serial port extension and virtual wire, etc.

Series 2 is a different story.