紀錄

tell application "System Preferences"
 activate
 reveal (pane id "com.apple.preference.universalaccess")
end tell

tell application "System Events"
 tell process "System Preferences"
  tell window "Accessibility"
   tell table 1 of scroll area 1
    -- Added "delay 1" to work in 10.11 - El Capitan
    delay 1
    select (row 2)
   end tell
   click checkbox "Use grayscale"
  end tell
 end tell
end tell
tell application "System Preferences" to quit

http://apple.stackexchange.com/questions/167967/creating-system-wide-keyboard-shortcut-to-launch-applications