iMac (late-2015 with retina disp), OS 10.13.6
The mac has T2 ports; the G-DRIVE has T3. I purchased the official mac T2 to T3 adaptor, which as is clearly stated on the Apple website:
“As a bidirectional adapter, it can also connect new Thunderbolt 3 devices to a Mac with a Thunderbolt or Thunderbolt 2 port and macOS Sierra or later.”
So WHY does the G-Drive not connect?