How to FIX “No Desktop Video Device Detected” for Blackmagic

Step by step Tutorial how to fix “No Desktop Video Device Detected” for Blackmagic Cards on macOS Big Sur. Super easy tutorial how to make working again your Blackmagic Decklink or Intensity cards with Blackmagic Desktop Video App 🙂 Easily Fix Blackmagic Decklink or Intensity cards and Blackmagic Desktop Video App 🙂

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How to FIX “No Desktop Video Device Detected” for Blackmagic Cards on macOS Big Sur

All instructions below I also showed in my video tutorial above, so if you are not experienced user, just first watch my video tutorial.

Instructions & Terminal Commands:

Uninstall Desktop Video App. Boot to recovery mode and in Terminal execute this:

csrutil disable 

Boot back to normal system and in Terminal execute this:

sudo rm -rf /Library/StagedExtensions/Library/Extensions/BlackmagicIO.kext

sudo rm -rf /Library/StagedExtensions/Library/Extensions/DeckLink_Driver.kext 

Boot to recovery mode and in Terminal execute this:

csrutil enable 

Install latest Desktop Video App and after reboot your Decklink or Intensity cards will be finally recognised by the Blackmagic Desktop Video app, enjoy 🙂

And if it’s still not working then just paste this command to Terminal, hit Enter, type your password and hit Enter:

sudo kextutil /Library/Extensions/BlackmagicIO.kext 

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