I've always opted to have my display turn off after X amount of time in lieu of using a screensaver. My screensaver preferences were set to Start after: Never. That is until today. I walked into the room and noticed the screensaver running. When I went to check the system preferences it was set to 20 minutes.

  • I did not set it to 20 minutes.
  • No one else ever uses this computer
  • I haven't done any updates to my OS recently

This strikes me as pretty odd. Anyone have a possible explanation? Might there be a historical record of when and how this change happened in a log somewhere?

I am running 10.11.3.

  • Have you tried a 'Repair Permissions'? – CousinCocaine Mar 19 '16 at 18:57
  • @CousinCocaine - can you be more specific? Are you suggesting that repairing permissions might have caused my preferences settings to change? – billynoah Mar 19 '16 at 20:27
  • Yep. Your permissions haven't changed after setting them. It might be due to file rights. – CousinCocaine Mar 19 '16 at 21:54
  • but what would cause it to suddenly change to 20 minutes? I've had it on Never for years and it's never been touched and always worked as expected in the past. The thing I'm trying to understand is what would cause my prefs to suddenly change? I haven't done anything to the permissions. – billynoah Mar 20 '16 at 2:37
  • strange indeed. As if the settings are back to there default state. Sorry, but I have no clue why. – CousinCocaine Mar 23 '16 at 20:31

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