Okay so I have late 2015 iMac 5k (Thunderbolt 2), and just received the OWC Thunderbolt 3 Pro dock. I am using the Apple TB 2 to TB 3 adapter to plug into the dock. When leaving the dock plugged in, it is causing my OS to fatally crash and reboot. So far it seems to be random when the crash happens. A few times it has rebooted while I was working on it, and a few times I have woken up my computer to see that it has rebooted. So far I have only had my Canon R5 plugged into it (with usb-c and nothing else). I will try just having the dock plugged in (and nothing else into the dock) to see if that still causes the issue. OWC advertised this use case would work, but so far I am a little upset.