Sudo rm -rf /Library/StagedExtensions/Library/Extensions/Blackmagic_Multibridge_Driver.kext In my case, the commands looked like this for the three extensions: Once you reboot, open Terminal and force delete the kernal extensions. You will get a message that SIP has been disabled.Ħ. Open Terminal to disable SIP: At the prompt enter this command: csrutil disableĤ. Uninstall Video Desktop using the uninstall program.ģ. Once I did all of this and then installed 12.0b1, it WORKED! Desktop Video recognizes the recorder and the picture displays correctly in OBS, using either SDI of HDMI.ġ.
To do that, you have to boot into recovery mode, disable SIP, force delete the kernal extensions, then reenable SIP. So, I thought about getting rid of those. Then I noticed that the uninstall left 3 kernal extensions on my system: I completely uninstalled several times and reinstalled, but it was still the same. I tried installing 12.0b1 and got the same thing. The recorder was recognized, but all I saw was a black screen in OBS. I experienced the same issue as everyone else. I had Desktop Video 11.7 installed on Catalina and then upgraded to Big Sur. MY SOLUTION - UltraStudio Recorder 3G and Big Sur
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