I ordered an FTDI USB serial cable that I'm using with my Mac (OS 10.14) and am trying to get the KX2 utility to talk to the radio. Every time I get the "KX2 is not responding" message. With my scope I could see that the computer is sending on the ring and not the tip, which I believe is opposite to what the KX2 is expecting, so I cut the cable and swapped the tip and ring wires. I verified with the scope that the computer is indeed now transmitting on the tip. However, I still get the "not responding" message. I have tried every bps rate setting in the KX2 and when I check the output with the scope it even looks like it is trying all four data rates. The plug itself is a stereo, which the KX2 manual says is fine; it even matches what the official KX2 serial cable plug looks like. Have any of you experienced something like this? Any ideas?