I have this simple code: tell application "QuickTime Player" activate new screen recording document "Screen Recording" start delay 10 document "Screen Recording" stop end tell This records a 10-second movie on my 10.8 machine with no problem. But on 10.9 mac-mini, QT hangs at the stop action above. It hangs at the window with message "Finishing Recording". I have to force quit it and still same thing. If I do these steps manually, they work. But with AppleScript or even same steps with Automator have same issue. I upgraded to 10.9.2, but still same issue. Is this a known bug? Any suggestions for a work around? Thanks.