DON'T UPGRADE TO CATALINA UNTIL YOU READ THIS!
This is a blog from November that needs repeating.
Upgrading to OS Catalina (10.15.3) will prevent you from being able to use your camera in Collaborate. This means that if you upgrade, you it's likely that the camera that shows your image to your participants (or your classmates and professor) won't work, but you can still participate in your lecture and everything else works. For more information, please contact us here at the Sakai helpdesk, 831-656-2020 or go here for more information from Blackboard.
What we know is that Blackboard will be discontinuing Collaborate "Original" in favor of their newer web conferencing tool, Collaborate Ultra, in December of this year. We are in the process of making the decision to stay with Blackboard and continue to use Ultra, or break with Blackboard in favor of another product to use in addition to our Zoom account. For this reason, Blackboard won't be fixing any issues as they break, like this camera glitch with Catalina.
If you are using Zoom, don't worry, Catalina works fine.