Rode Go wireless mic not working on 2017 Macbook Air

Hi

I'm trying to connect the Rode wireless mic via USB and the Rode SC7.

It's being recognised by the mac (as KT_USB_AUDIO) but the mac is still using it's internal mic. Tested by moving the mac away while speaking into the Rode mic.

I've also tried using a splitter from the headphone port but the mac didn't recognise the mic.

Thanks