cisco webex mac share screen not working

I had to exit the meeting and come back in to allow the screen share to work for the remainder of the meeting.

Upon stopping the sharing and looking to start again, the single laptop screen share also reverted to black. (so as to rule capabilities, machine issues) the first time it happened in the meeting I stopped the PowerPoint presentation, unplugged my external monitors and forced to show only my single laptop screen to successfully share the screen. Another person and I tested the ability to do this in a previous meeting without a problem and then in the same meeting after all participants but the two of us had left without a problem. To give an opportunity for select participants to be seen via their video cameras we would stop sharing for the video screens to be prominent, upon moving forward in the meeting and again looking to share the screen with (PowerPoint show on) the screen shares went black and were not visible to participants.

During a Webex meeting with a participant list of at least 168 people joining maybe half with video, we started sharing a PowerPoint presentation with no issues.

Cisco webex mac share screen not working