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Recover from WindowServer crashes using one machine
I discovered recently that a startup process that was being launched from ~/Library/Preferences/loginwindow.plist was causing a hang at shutdown or restart - I would just be left with my desktop picture and a cursor and doing a force-quit key combo would just bring up an empty process window. The solution other than three-keying or ssh-ing was to hit the power button (or ctrl-eject if you don't have a laptop), hit the Sleep button, and then wake it up. If you have the security settings set to authenticate when waking up from sleep, the authentication dialog has a Switch Users button. You can then log in as a different user and do a restart (and authenticate to terminate your other session) or dig around and see what's causing the problem. I've found a lot of UI hangs can be gotten around by getting rid of loginwindow.plist or com.apple.loginwindow.plist. Background apps can still be a bear, even in OSX... |
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