I have a flashing blue light on my Quantum 2626. I can't seem to get my Mac Mini to recognise the interface. I would guess that the driver has not been installed. I have downloaded Universal Control v18.104.22.168835 but it too doesn't seem to see it.
I have tried this too, with no luck. If this message does not appear in Security & Privacy, restart the computer. Note: If Universal Control has already been installed and Quantum is not syncing, run the uninstaller and reinstall the latest version of Universal Control to install the driver.
I am running Catalina using an apple approved 0.8m thunderbolt 3 cable