Here is a list I found on a BlackmagicDesign forum of what capture cards work on macOS / M1 chips. I was wondering why some of my capture cards worked while others wouldn’t connect; after upgrading my computer. Hope others can find this useful as well.
M1 and Intel Macs:
DeckLink Duo 2
DeckLink Quad 2
DeckLink Quad HDMI Recorder
DeckLink 8K Pro
DeckLink 4K Extreme 12G
DeckLink Micro Recorder
DeckLink SDI Micro
DeckLink Mini Monitor 4K
DeckLink Mini Recorder
DeckLink Mini Recorder 4K
DeckLink SDI 4K
DeckLink Studio 4K
UltraStudio Recorder 3G
UltraStudio Monitor 3G
UltraStudio HD Mini
UltraStudio 4K Mini
UltraStudio 4K Extreme 3
Intensity Pro 4K
DeckLink 4K Pro
DeckLink 4K Extreme
UltraStudio 4K
UltraStudio 4K Extreme
Intel Macs only:
DeckLink Mini Monitor
DeckLink HD Extreme 3
DeckLink HD Extreme 3D
DeckLink SDI
DeckLink Duo
DeckLink Quad
DeckLink Studio
UltraStudio Express
UltraStudio Mini Monitor
UltraStudio Mini Recorder
Intensity Pro
Intensity Shuttle Thunderbol