Есть документация для этого, я приведу пример в этом ответе .
Следующее работает с Growl 1.3.3 на OS X Lion:
tell application "Growl" set the allNotificationsList to {"Word Count"} set the enabledNotificationsList to {"Word Count"} register as application "Word Counter" all notifications allNotificationsList default notifications enabledNotificationsList icon of application "Script Editor" set myCount to count (the clipboard) set myWords to count words of (the clipboard) set myParas to count paragraphs of (the clipboard) -- Send a Notification... notify with name "Word Count" title "Word Counter" description (myCount as text) & " " & (myWords as text) & " " & (myParas as text) application name "Word Counter" end tell