Thanks Dan - A quick follow-up:
*You probably need to install the driver. See http://chirp.danplanet.com/projects/chirp/wiki/MacOS_Tips*
Done - thanks.
*Use System Information -> USB to find your cable in the USB device tree. If it's a Prolific device, you can try the open source driver mentioned on that page...*
What's the syntax I need to use in Chirp to point it to the cable? What you're looking at below is what System Information is reporting for the USB-to-Serial cable I'm using (Edgeport/1), plugged into a USB hub. But none of these elements seems to work as a port address in Chirp. (I'm sure I'm missing something really obvious...any help is appreciated.)
*Edgeport/1: *Product ID: 0x0215 Vendor ID: 0x1608 (Inside Out Networks Version: 0.01 Speed: Up to 12 Mb/sec Manufacturer: Inside Out Networks Location ID: 0xfd136000 / 6 Current Available (mA): 500 Current Required (mA): Unknown (Device has not been configured)