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I tried to look up related problems with this, but I haven't been able to find a solution. After leaving my computer on, charged, and step away, sometimes it logs my account off. When I come back, log on, all my applications have been turned off. I have adjusted the settings under "Energy Saver" and allow the computer a longer sleep time, but that doesn't seem to work.

OS X Version 10.8.2 Any suggestions?

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What model / how old is your Mac? – Zo219 Jan 7 '13 at 1:35
Mountain Lion has some new auto-terminate function for apps, which COULD explain that part. But, the auto-log-off is the strange part to me. Have you checked the Console Log? – jimtut Feb 19 '13 at 18:30

When you say it "logs your account off" do you mean that you have to enter your password?

My guess is that someone has set Security & Privacy settings to require a login password after sleep or screen saver begins. Go to Apple menu > System Preferences, click Security & Privacy, and then click General to see.

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This would not lead to applications being quit when the computer locks. – octern Feb 19 '13 at 21:38
@octern true, but it's not guaranteed the two symptoms are related… – ghoppe Feb 19 '13 at 21:39
  1. Go to System PreferencesSecurity & Privacy.
  2. Unlock the preference pane.
  3. Click Advanced.
  4. Uncheck the Log out after ? minutes of inactivity or change the time.
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