I'm having the same issue with an Arduino MKR1000.
I plug it in and see the green led light up, but the device does not show up in the Arduino IDE or my Mac's System Report. I only see the Bluetooth port in the IDE. I've tried two Macbook Pros running MacOS 12.0.1 and 11.6.1 and both have the exact same issue.
Here's a list of what I've tried with no success:
- Two Macbooks running different versions of macOS
- Multiple USB hubs, USB ports, and USB cables
- Multiple versions of Arduino IDE (previous, current, nightly, 2.0 beta)
- Multiple versions of Arduino IDE board manager packages
- Manually resetting Arduino board (double pressing reset button)
- Installing all possible drivers I've seen online
Starting to think it may be a defective board, as I've read reports that the LED can still light up despite the rest of the board being defective 