[chirp_users] RT Systems cable and Chirp on OS X

I bought this cable because it fit the radio and was cheaper than the Icom cable. It works with chirp in Windows 8, no problem. I downloaded the OS X drivers from the RT Systems website and the Mac recognizes the cable (which appears to have a custom chip) but when I try to open the serial port in chirp it only shows a couple of internal connections but not the cable nor my IC-31A. The Has anyone been able to get a RT Systems cable to work in OS X?

Bob, N7XY