This has been discussed before in the forum. I have no problem with High Sierra, all versions and Overbridge (or the Virus TI, which has also a tight integration of audio with DAWs). Changing my laptop, the devices were no longer recognised by the Mac OS. Because of the tight integration with the OS, so it seems, there are checks and drivers may be blocked in the same way the installation of new software requires the user to allow the process to move on. If you go the Apple logo on the top left, then Systems Preferences, then Security & Privacy, one may find a message there that something is being blocked. Now, I did not see anything there when I got a hint that I should look there. However, when I rebooted the laptop and had the Security & Privacy open, something popped up. Unchecking this, just like if there was some software installation, all was fine again. So, in case all other USB devices (e.g Octatrack) work fine but only the Overbridge devices are not recognised at all, this may be happening. Myself nd other solved their problem this way.