
So, what's the difference? Well, TTY devices are for calling into UNIX systems, whereas CU (Call-Up) devices are for calling out from them (eg, modems).
Putty for mac serial connection serial#
You might notice that each serial device shows up twice in /dev, once as a tty.* and once as a cu.*.

Note: Check your adapter works after an OS Update, as you may have to re-install the driver. Select this port name in a terminal program. This indicates the USB-Serial driver is working. dev/cu.Bluetooth-PDA-Sync /dev/cu.usbserial dev/cu.Bluetooth-Modem /dev/cu.iPhone-WirelessiAP


Most Serial-to-USB adapters will work on a Mac with one of the following OS X drivers. You can use screen, although Minicom (or a GUI program) offer more features and functionality. You just need a serial to USB adapter, the right driver, and some Terminal software. Mac's are excellent tools for accessing serial device TTY ports (to console into PBX's, switches, and routers).
