script para cambiar la configuración de las teclas de función de las Preferencias del Sistema ya no funciona en Big Sur OS11

Este código AppleScript me funciona en Big Sur.

tell application "System Preferences"
    reveal anchor "keyboardTab" of pane "com.apple.preference.keyboard"
end tell
tell application "System Events"
    tell process "System Preferences"
        repeat until checkbox "Use F1, F2, etc. keys as standard function keys on external keyboards" of tab group 1 of window "Keyboard" exists
            delay 0.1
        end repeat
        click checkbox "Use F1, F2, etc. keys as standard function keys on external keyboards" of tab group 1 of window "Keyboard"
    end tell
end tell
quit application "System Preferences"

Si esa versión arroja errores aquí hay una versión alternativa que también me funciona.

tell application "System Preferences"
    reveal anchor "keyboardTab" of pane "com.apple.preference.keyboard"
end tell
tell application "System Events" to tell process "System Preferences"
    repeat until checkbox 3 of tab group 1 of window "Keyboard" exists
        delay 0.1
    end repeat
    click checkbox 3 of tab group 1 of window "Keyboard"
end tell
quit application "System Preferences"

Tuve problemas similares con mi script de expansión/compresión de pantalla y lo arreglé refactorizando para usar tell directamente en los grupos de pestañas. Tal vez puedas probar:

tell application "System Preferences"
    reveal anchor "keyboardTab" of pane "com.apple.preference.keyboard"
end tell
tell application "System Events"
    tell process "System Preferences"
        tell tab group 1 of window "Keyboard"
            click checkbox "Use F1, F2, etc. keys as standard function keys"
        end tell
    end tell
end tell
quit application "System Preferences"

Como referencia, mi caso era este script que funcionaba antes de Big Sur

on run {input, parameters}

    activate application "System Preferences"
    tell application "System Events"
        tell process "System Preferences"
            click button "Displays" of scroll area 1 of window "System Preferences"
            delay 0.5

            click radio button "Scaled" of radio group 1 of tab group 1 of window "LG ULTRAWIDE"
            delay 0.5
            select row 4 of table 1 of scroll area 1 of tab group 1 of window "LG ULTRAWIDE"

        end tell
        delay 1
        quit application "System Preferences"
    end tell

    return input
end run

y los cambios que tuve que hacer para que funcionara después de Big Sur

on run {input, parameters}

    activate application "System Preferences"
    tell application "System Events"
        tell process "System Preferences"
            click button "Displays" of scroll area 1 of window "System Preferences"
            delay 0.5

            tell tab group 1 of window "LG ULTRAWIDE"
                click radio button "Scaled"
                delay 0.5
                select row 4 of table 1 of scroll area 1
            end tell
        end tell
        delay 1
        quit application "System Preferences"
    end tell

    return input
end run