Unable to acquire SDI signal with blackmagic acquisition card under mac

My Mac version UE4 has installed the blackmagic plug-in. It has opened the media framework utilities. But there are no options for adding media bundles under the media menu. There are no options for blackmagic. I can have these two options on another PC. I want to ask for help. Is it not supported under the Mac

I’m having the same problem. Running UE4 on Catalina. The Blackmagic plugin is activated in UE4 but the blackmagic option does not appear under “Media Source” when I have working blackmagic SDI input cards connected to the machine.