I’ve had a bit of trouble getting a Google Pixel C to be recognised on my Mac – wasn’t able to get it showing up in System Profiler and wasn’t able to see it with adb.
I was initially trying various combinations of the Apple USB-C to USB-A Female adapter and then different USB cables and dongles. No go.
What worked in the end was using a Belkin USB-C to USB 2.0 cable with a male A plug. I have read that some people are having problems with using USB-C to USB 3.0 cables, so I played it safe (and saved myself an extra ten bucks in the process) and stuck with a USB 2.0 cable. I went with Belkin because they’ve never let me down in the past with cables not working.
I’m able to plug it into a USB3 hub that I’m using and my Mac sees the Pixel C with no problems. The Mac can see the tablet and Android can see that USB debugging is connected. I also didn’t need to install any drivers on the Mac either, just plug it in and away I went.