Recently purchased a new macbook pro and am unable to connect my dealthstalker v2 pro via bluetooth or 2.4ghz. Was working just fine on my old macbook pro. The keyboard works fine as I can use it when directly connected via usb. I can see the keyboard in my “Nearby Devices” in my bluetooth settings but it wont connect. 

Any thoughts? I believe there is a firmware update for my keyboard but I can’t download it on my macbook. Any suggestions for this as well?

Thanks!