Seleccionar un menú desplegable en Safari

Probado bajo MacOS High Sierra Aquí está cómo lo hago yo:

set saveToLocation to "~/Documents"
set myURL to "http://www.webiste.com/"

tell application "Safari"
    make new document with properties {URL:myURL}
    activate
end tell

tell application "System Events"
    repeat until exists (buttons of ¬
        UI elements of ¬
        groups of ¬
        toolbar 1 of ¬
        window 1 of ¬
        process "Safari" whose ¬
        name = "Reload this page")
        delay 0.5
    end repeat
    tell application process "Safari"
        click menu item "Export as PDF…" of ¬
            menu "File" of ¬
            menu bar item "File" of ¬
            menu bar 1
        repeat until exists sheet 1 of window 1
            delay 0.05
        end repeat
        keystroke "g" using {shift down, command down}
        repeat until exists sheet 1 of sheet 1 of window 1
            delay 0.05
        end repeat
        set value of ¬
            combo box 1 of ¬
            sheet 1 of ¬
            sheet 1 of ¬
            window 1 to ¬
            saveToLocation
        click button "Go" of sheet 1 of sheet 1 of window 1
        click button "Save" of sheet 1 of window 1
    end tell
end tell

_{Nota: El <em>ejemplo </em><strong>AppleScript </strong><em>código </em>es sólo eso y no contiene ningún otro <em>tratamiento de errores </em>según corresponda. Corresponde al usuario añadir cualquier <em>tratamiento de errores </em>como sea apropiado, necesario o deseado. Eche un vistazo a la <a href="https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptLangGuide/reference/ASLR_control_statements.html#//apple_ref/doc/uid/TP40000983-CH6g-129232" rel="nofollow noreferrer"><strong>intente </strong></a><em>declaración </em>y <a href="https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptLangGuide/reference/ASLR_control_statements.html#//apple_ref/doc/uid/TP40000983-CH6g-129657" rel="nofollow noreferrer"><strong>error </strong></a><em>declaración </em>en el <a href="https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptLangGuide/introduction/ASLR_intro.html" rel="nofollow noreferrer"><strong>Guía del lenguaje AppleScript </strong></a>. Véase también, <a href="https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptLangGuide/reference/ASLR_error_xmpls.html#//apple_ref/doc/uid/TP40000983-CH221-SW1" rel="nofollow noreferrer"><strong>Trabajar con errores </strong></a>. Además, el uso de la <a href="https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptLangGuide/reference/ASLR_cmds.html#//apple_ref/doc/uid/TP40000983-CH216-SW10" rel="nofollow noreferrer"><strong>retraso </strong></a><em>comando </em>puede ser necesario entre eventos cuando sea apropiado, por ejemplo <code>delay 0.5</code> con el <em>valor </em>de la <em>retraso </em>ajustado apropiadamente.}