The thing is, CAT didn't get anywhere in my case either, same point your's did apparently.
I've had the CAT patch running throughout Yosemite without a problem.
I just installed the GM and disabled SIP, then tried to run CAT and received the same message as you have.
To my understanding it says you need to have a supported BT 4.0 card, which it finds since the value it's looking for is 6 and it gets this very number but somehow sees it as an unsupported device.
It's just a conclusion of mine, since I'm no expert in the technical field, just a lawyer with a knack for tech