Microsoft Teams Mac OS client is not recognizing external cameras after updating to version 1.3.00.18164.

Anonymous
2020-07-24T04:03:58+00:00

Microsoft Teams Mac OS client stop recognizing external cameras (EOS Webcam utility, EpocCam, NDI client) after updating to version 1.3.00.18164; only MacBook Pro built-in camera is listed as available device.

※Update executed today (07/23) some hours ago.

Web app through browser (Edge) is OK, it kept external cameras listing and they work.

Does anybody had came across same issue after updating?

OS: macOS Catalina version 10.15.6

Microsoft Teams version: 1.3.00.18164

Microsoft Teams | Microsoft Teams for business | Teams for Mac

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Anonymous
2020-07-29T21:10:25+00:00

I had the exact same thing happen to me after updating to the latest version of teams.  However, I was able to come up with a solution that resolves the issue entirely.  It has to do with how Apple is starting to codesign specific apps to block 3rd party CoreMediaIO plugins.  If we remove that codesigning, then it will allow those 3rd party plugins to function again.

The fix is pretty simple.  First, completely exit out of Teams, then open Terminal and issue the following commands:

If you havent installed xcode previously, first run:

xcode-select --install

Then, run:

sudo codesign --remove-signature "/Applications/Microsoft Teams.app"

and:

sudo codesign --remove-signature "/Applications/Microsoft Teams.app/Contents/Frameworks/Microsoft Teams Helper.app"

Once you've issued those commands, open up Teams.  It should ask you for an administrator password to allow the (now) unsigned application to access your keychain.  Once entering your password and selecting, "Always Allow", the issue should be resolved. (At least until the next update to teams is released).

*****UPDATE*****

As of version 1.3.00.28778 the process has changed and the above workaround is no longer valid.  In order to get this fix working on the latest version of Teams, additional commands will need to be entered.  Keep in mind, these commands are relative to where you have Teams installed, so if it is in a different location, you'll need to adjust the file path accordingly.  So as it stands currently here are all of the commands (must be entered one by one and not pasted in one big block) that will need to be entered:

xcode-select --install (only if you haven't already)

sudo codesign --remove-signature "/Applications/Microsoft Teams.app"

sudo codesign --remove-signature "/Applications/Microsoft Teams.app/Contents/Frameworks/Microsoft Teams Helper.app"

sudo codesign --remove-signature "/Applications/Microsoft Teams.app/Contents/Frameworks/Microsoft Teams Helper (GPU).app"

sudo codesign --remove-signature "/Applications/Microsoft Teams.app/Contents/Frameworks/Microsoft Teams Helper (Plugin).app"

sudo codesign --remove-signature "/Applications/Microsoft Teams.app/Contents/Frameworks/Microsoft Teams Helper (Renderer).app"

******UPDATE #2******

I totally forgot about this thread and decided to take a look at it again. From the latest comments, it looks like a lot of you are already aware that this issue has officially officially fixed by Microsoft as of version 1.4.00.8872, so this workaround should no longer be required as long as you are up to date.

Source: https://docs.microsoft.com/en-us/microsoftteams/troubleshoot/teams-on-mac/virtual-camera-doesnt-work-macos

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  1. Anonymous
    2020-08-20T14:35:15+00:00

    I’m sorry, I’ve never used Terminal before... I had the same problem @BenKnobe related. I’ve already installed xcode and still get the same error... when I put the first command, after entring my user’s password, I get:

    /Applications/MicrosoftTeams.app: no such file or directory

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  2. Anonymous
    2020-08-19T15:27:35+00:00

    I have the same issue.  Initially, the terminal commands indicated above restored virtual cameras, and I was able to use OBS with the Virtual Camera Plugin, but then it quit working again.  I have had to resort to using the web version of Teams.  When I run teams in Google chrome, I can select and use the OBS Virtual Camera.

    Update: In response to suggestions here, I re-ran the terminal commands and am now again able to use the Teams desktop app with OBS virtual camera.  My guess is that after getting this working originally, it was broken again with the next Teams update.  For now, the solution seems to be to re-run the terminal commands with each update.  Strangely, I could still select the OBS virtual camera in the Teams app and I could see myself just fine.  It just didn't show anything to people on the other end of the call.

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  3. Anonymous
    2020-08-12T17:00:48+00:00

    @greghiggins3, Thank you! It worked and apologize for missing your instructions on July 7th. Thrilled that my virtual camera is working again!

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  4. Anonymous
    2020-08-12T05:15:14+00:00

    To install xcode, try entering: xcode-select --instal l

    Then try entering previous two commands i mentioned.

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