"UltraStudio Monitor 3G Video Device Not Detected" problem

I know that a lot of people are hiving this problem
Did anyone solve it without having to erase their computer?

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I can not get this laptop to see my ultrastudio monitor 3G:
macbok air, M1, sonoma 14.6.1

But I can use it on this laptop:
macbook pro intel i5, monterey 12.7.7

I have:
reinstalled and installed desktop video
12.7.1
12.9
14.2.1
none work
I have davinci resolove studio 19.1 installed

If anyone has any ideas I would love to hear them

Many thanks

Alan Mahon

I had the same problem with my M1 MBP but all worked on my M1 Mac mini.
macOS Sequoia 15.1.1

Uninstall, reboot, reinstall, authorise the Extension in macOS, did still not result in Desktop Video Setup identifying the 3G Monitor/Recorder.


Running this terminal command showed that macOS identified the Extension.

Code: Select all

systemextensionsctl list

Running the terminal command showed that the DesktopVideoUpdateTool can see the Monitor/Recorder device.

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/Library/Application\ Support/Blackmagic\ Design/Blackmagic\ DeckLink/Desktop\ Video\ Updater.app/Contents/MacOS/DesktopVideoUpdateTool -l

Kickstarting the DesktopVideoHelper did manage to get the Desktop Video Setup to suddenly identify the device. But after a disconnect and reconnect it still did not show anything so something did not properly launch in the background.
viewtopic.php?f=3&t=189485&p=991646

Looking at the Activity Monitor on my Mac mini, showed that the process

Code: Select all

com.blackmagic-design.BlackmagicIO.DExt

appeared everytime I connected a device and disappeared as soon as I disconnected it.


This is what I did to get it all working on my MBP:

1. Removed the "Blackmagic Desktop Video Driver Extension" under the Driver section.
Click the three dot button and choose "Delete Extension"
https://support.apple.com/en-gb/guide/m ... usr003/mac

2. Some of these Agents and Daemons was not properly deleted during the Unistall.
So I manually delete the LaunchDaemons and LaunchAgents
/Library/LaunchAgents/...
com.blackmagic-design.DesktopVideoUpdater.plist
com.blackmagic-design.DesktopVideoDriverExtension.plist
com.blackmagic-design.DesktopVideoDriverExtensionRemove.plist

/Library/LaunchDaemons/...
com.blackmagic-design.DesktopVideoHelper.plist
com.blackmagic-design.DesktopVideoDriverExtension.Helper.plist

3. Ran the Uninstall Desktop Video.app

4. Rebooted

5. Reinstalled Desktop Video Setup 14.2.1

6. Reboot and Authorised the Extension (or if it was the other way around)

7. Launched Desktop Video Setup

8. Connected the 3G Recorder and after a few second it was identified by the Desktop Video Setup
Disconnected it and treid the 3G Monitor instead and with a few seconds the Monitor device was identyfied as well.