Cause:
As part of hardening the security of the Cisco Webex Meetings Desktop App, the macOS clients had the following entitlements removed:

• Disable Library Validation Entitlement
• Allow DYLD Environment Variables Entitlement

As a result, many virtual camera software applications stopped working because the webcam drivers they use are not signed by Apple, and thus cannot be loaded by the Cisco Webex Meetings Desktop App.

Affected Releases:

• WBS40.7.0
• WBS40.6.0
• WBS40.4.3
• WBS40.2.16
• WBS39.5.23

Solution:
Beginning with WBS 41.2, Cisco Webex supports virtual camera software applications, and drivers in the Cisco Webex Meetings and the Webex app.