Serial Ports on Mac OSX

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A serial port may be added to the Mac via a USB-to-serial converter (like the Sabrent USB to serial cable that uses the Prolific PL-2303 chip - drivers)

To talk to it, you need a terminal emulator. This can be with the built-in Terminal application.

Find available tty devices:

ls /dev/tty.*

Pick the one you want (e.g. /dev/tty.usbserial) then use by

screen /dev/tty.usbserial 9600

Quit by typing

control-A

control-\

Some terminal emulators are:

SerialCommX, ZTerm