Capture card problems with OS 10.13

Ever since my two retro computers upgraded from OS 10.12 to 10.13 all the capture cards whether they be analog or digital just stopped working.

Frankly it's a pain to go back to 10.12 and the stealth changing that takes away your ability for capture cards to work is awful I've been spending the last 5 days trying to get back to OS 10.12 by first going to 10-8 then 10-12 then trying to put my old date on the hard drive through but in one of those three steps everything I try always fails.

the videos say many different things so how do I do this right there seems to be no video about backtracking OSes.
 
I found the answer. I cannot use an electronic HDMI switcher and have it recognized correctly. I have to have a manual push button HDMI switcher for this work.

It's like my automatic switcher adds security when there shouldn't be.
 
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