Auflisten aller serieller Anschlüsse:

ls /dev/tty.*
/dev/tty.Bluetooth-Incoming-Port 
/dev/tty.usbmodem1411
/dev/tty.Bluetooth-Modem

Starten einer Terminal Session

screen /dev/tty.usbmodem1411 9600,cs8,-cstopb,-parity,-crtscts

Links:

• https://blogs.oracle.com/blogsagainbynight/entry/terminal_to_serial_usb_devices
• https://learn.sparkfun.com/tutorials/terminal-basics/all