I've been trying to use Tethered Capture with my Nikon Z7 to digitise old slide films. The problem is that either the camera is not found or if it is, it disappears after a few shots. I get the "Detecting Camera" window and the spinning gear wheel.
I searched all the tutorials, help and forums, checked and updated all software and firmware but the problem persisted. Importing pics by the USB cable works perfectly. Eventually I realised that the camera was connected to my Mac Pro through a USB3 hub. Connecting the camera directly to the Mac has solved the problem 🙂
I've suggested that the "Troubleshoot tethered capture" page emphasises that the camera should be directly connected.
Hope this helps others.