Virtual Camera Stopped working after Upgrading to Tahoe 26.3.

My company is using MS InTune to manage our devices and they recently also deployed the Crowdstrike Falcon product. Everything was fine until I upgraded my MacBook Air M3 to Tahoe 26.3. Now I cannot start the Virtual camera. I uninstalled and re-installed OBS Studio several times. Checked all the access requirements and still I get the following error:

[mac-virtualcam] mac-camera-extension: OSSystemExtensionErrorCode 10 ("The operation couldn’t be completed. (OSSystemExtensionErrorDomain error 10.)")

I have the last log file if that helps. I cannot find any mention of this problem anywhere.

OSSystemExtensionErrorCode 10 on an MDM-managed machine almost always means the system extension isn't allowlisted in InTune -- it's not an OBS problem per se. Your IT admin needs to add a System Extension policy allowing com.obsproject.obs-mac-virtualcam. CrowdStrike Falcon post-Tahoe is especially aggressive about blocking unapproved extensions, so that's probably what's actually blocking it even after reinstall.

Thank you for the reply. That pretty much confirms all the troubleshooting I have done. Working with my IT dept. to fix it hopefully.

Would this particular issue also be inline with NDI camera inputs not showing after new Mac OS install?

NDI is a bit different from virtual cam -- it doesn't rely on a system extension, it's a plugin that installs NDI Tools separately. After a fresh macOS install, you need to reinstall NDI Tools from ndi.video and then reinstall the obs-ndi plugin. Even if OBS is already installed, the NDI runtime library gets wiped with a clean OS install and OBS won't find it. Relaunch OBS after reinstalling both and it should show up.