I'm using Zoom Desktop Client on macOS with a two screen setup, using one for Zoom and the other for working on other stuff; however, at the top of the latter I keep having this pop up window:
How can I disable this?
Just update Zoom and it should go away.
If it is still appearing, you can try clicking on "View Options", which appears next to the green bar "You are viewing ____'s screen" and choose Side-by-side mode