[littlesicily]

Originally Posted by Darryl Ramm

Lets make progress here. The Thunderbolt adapter will be fine, it it's known to work with other devices. Thunderbolt 1 or 2 does not matter, Thunderbolt 1 is a trivial subset of Thunderbolt 2 capabilities.

So really useful info would be how exactly is this not working. Does the device show up in...

System Report>Thunderbolt
Audio Midi Settings?
Digitest?
Playback Engine settings?

Confirm you are installing 2018.12 (we don't' care what your friend installed).

I can't recall what Mojave throws up for HD driver security approvals but make sure you have not missed any in Systems Preferences>Security & Privacy permissions when you run the installer again.

Thanks, Darryl.

System Report>Thunderbolt. YES
Audio Midi Settings? NO
Digitest? NO
Playback Engine settings? NO

Yes 2018.12

Not sure about security permissions. Nothing popped up when installing the HD driver.