PortTerm is designed to give developers easy access to serial ports in OS X. It's a tool for writing to and reading from serial ports via a GUI. It includes the ability to write from a file and log data to a file.
"Read as" checkbox is ON by default. Transmit messages are color coded in blue Fixes a bug with "rn" suffix of Transmit messages
Mac OS X 10.1 or later, Mac with a serial port or serial port adapter with proper drivers.