The screen application can be run via the terminal command interface. Start terminal.app and type "ls /dev/tty.*" to list the serial devices to find the one you want to connect with. Then type "screen /dev/tty.xxx 57600" where xxx is the chosen port name.
To end the session type control-a followed by control-\.
The wireless Bluetooth port can be used if the reader has a Bluetooth serial adapter. Use the OSX Bluetooth control panel to pair with the adapter and it will be shown in the /tty/dev list.
