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I would like to write a script that kills XCode, Chrome, and the iOS Simulator, whenever I fast-user-switch on Lion.

How do I trigger such a script? And should I use killall type commands?

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I can't think of any way to have fast user switching trigger running a script. But you could use a script that both quits the apps and switches to another user. If you save it to /usr/bin/, it will be on the path even on a guest account.


cgsession="/System/Library/CoreServices/Menu Extras/"

osascript -e 'try' -e 'quit app "Xcode"' -e 'end try' &
osascript -e 'try' -e 'quit app "Google Chrome"' -e 'end try' &

if [[ $# == 0 ]]; then
    "$cgsession" -suspend
    userid="$(id -u "$1")"
    [[ -z $userid ]] && exit 1
    "$cgsession" -switchToUserID $userid
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