RM-IR on OS X Yosemite

[matt]

I'm on the High Sierra OS and I can't get my setup to work on my Mac. It reports "signature not valid"?

However, it works without modification in Windows running in a VM.

my cable shows as, so likely a driver issue but who knows:

USB-Serial Controller:

Product ID: 0x2303
Vendor ID: 0x067b (Prolific Technology, Inc.)
Version: 3.00
Manufacturer: Prolific Technology Inc.
Location ID: 0x14100000