Well, I located an unwanted, very old MacBook Air and it updated to High Sierra. I can confirm that installing these crappy v1.7.9 drivers will result in the 816 not being seen by the computer. And as others mention, uninstalling and reinstalling the v1.7.8 version won’t fix the issue.
I revived my interface by following the process laid out here
Uninstall drivers, manual cleanup, disable system integrity, install v. 1.7.8 , activate system integrity.
I can’t believe SB distribute this interface killer!!!
At least I can configure it to use as extra preamps now.