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As of version 1.3.00.28778 the process has changed and the above workaround is no longer valid.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
    2021-04-15T08:25:28+00:00

    Mope, even the web-app in Microsoft Edge on my new M1 Mac doesn’t detect the cam.

    So with now over 5 hours complaining about negative tests and system tweaking I simply have got the meaning, that Microsoft Teams sucks.

    Perhaps they should ask the colleagues from Skype how it works?

    There is no chance to see a preference for Mic or Cam in the preferences.

    It simply hasn’t got the Menu part for Hardware

    Uwe

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  2. Anonymous
    2021-04-15T07:54:59+00:00

    Hi Uwe,

    of course you can always start from scratch by simply uninstalling and reinstalling Teams. Since xcode seems to be installed on your system already, there is no need to execute "xcode-select --install" (as stated in the terminal message).

    Regarding the signature removal process : As of now, there is no other option available if you want to use your Teams installation with a virtual cam. If you are uncomfortable with using command line configurations, you could simply use the web version of Teams to make video calls, no problems there.

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  3. Anonymous
    2021-04-15T06:48:51+00:00

    I tried the fix with the 

    "xcode-select --install

    xcode-select: error: command line tools are already installed, use "Software Update" to install updates

    sudo codesign --remove-signature "/Applications/Microsoft Teams.app" . . . . " etc procedure and the only result was that I now have to type in 4 ! ! ! times the Pasword for my Account when starting up Teams. So thanks for that. At the time I'm really p... off.

    As I am no command line guru I have no idea how to check up if saomething went wrong with it.

    Is there a possibility to remove everything completely, to start a free Teams installation from the ground?

    Uwe

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  4. Anonymous
    2021-04-14T22:35:13+00:00

    Thanks for this, how is this not sorted after so long?! I can confirm this fix still works in v1.4 of Teams.

    Does anyone know if this works for other apps that appear to have the same issue, just replacing the app name with another? Will I break anything if I try it?

    Thanks again

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