Fix A/V Output None Found in Final Cut Pro X in just 3 minutes! Final Cut Pro Tips and Tricks. macOS Tips and Tricks.
If you are a Final Cut Pro X user and if you also use Blackmagic Design Decklink, UltraStudio or Atem to get clean feed to your grading monitor, and if you lately upgraded to macOS Sonoma, then you’re in trouble 🙂 Most probably you encountered problem that your Blackmagic device stopped showing up in the Final Cut’s A/V output. All you can see now is only sad error message: “A/V output not found”. Here’s how to fix it 🙂
How to enter macOS Sonoma Recovery:
Apple Silicon Mac: https://support.apple.com/guide/mac-help/mchl82829c17/mac