Wow! Talk about a pain in the butt!
Hopefully this helps you get your Wouxun WXUSB cable working with your Mac OSX Machine.
Go to http://www.prolific.com.tw/eng/downloads.asp?id=31 and you'll see the Mac OSX drivers for the USB cable. Installed those then I was able to use various Mac utilities for programming my Wouxun KG-UV3D.