Toggling the Autohide Menu Bar Setting on macOS Big Sur

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41

and FWIW, back on Big Sur, I'm also finding this JavaScript for Automation snippet reliable:

(() => {
    "use strict";

    const 
        se = Application("System Events"),
        dockPreferences = se.dockPreferences;
    
    return (
        se.activate(),
        dockPreferences.autohideMenuBar = (
            delay(0.01),
            !dockPreferences.autohideMenuBar()
        )
    );
})();

( click the Copy icon at top right of the code block above )

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