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 :)
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✅ Instructions & Terminal Commands:
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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
Until Blackmagic will fix their drivers on some builds you need to execute the last command after each boot. You can automate it so you don't have to manually do it each time.
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Watch video How to FIX Blackmagic Desktop Video on macOS - Step By Step online without registration, duration hours minute second in high quality. This video was added by user Morgonaut 25 June 2021, don't forget to share it with your friends and acquaintances, it has been viewed on our site 52,246 once and liked it 643 people.