Video Sync problem

[VRS]

Well I tried it on 3 sessions all doing the same thing. Different programs.

But still ...

So I tried what you suggested. No dice. After 17 minutes or so it started dropping frames and stuttering.

[BScout]

Are you still on Monterey? (macOS 12)?
Go to Ventura. If you go to the Blackmagic Forums, there are multiple threads of similar issues. And it really is about marrying up macOS version with Blackmagic Desktop View version. People have found which combinations that work there (and they don't agree with listed "compatibility.") Seems an ongoing thing. Also seems important that you run the uninstaller of the previous version of Desktop View before running the installer of the new version you want to change to. (which sounds like Desktop View can leave problematic settings/files behind)