Is there a way for the host of a Zoom meeting running the Zoom app on a Mac to admit everyone from the waiting room via keyboard not mouse?
There's a couple of scenarios to consider.

Showing/hiding the Participants view
No people in the waiting room
Only one person waiting in the waiting room
More than one person waiting.

I'll cover only the case where the Participants View is already active, and the Admit All link is visible due to multiple clients on the waiting list.
This code will click the &quot;Admit All&quot; link
tell application &quot;System Events&quot; to tell process &quot;zoom.us&quot;
    click last UI element of UI element 1 of row 1 of outline 1 of scroll area 1 of splitter group 1 of window &quot;Zoom Meeting&quot;
end tell

To Bind it to a keyboard, 2 options:

Use Keyboard Maestro to run an AppleScript on a hotkey trigger - Simplest, but KM is not free.
I'll save the script above as an Application so that it's available to run from the Spotlight.