I am running OSX Lion 10.78.4 and the computer will no longer go into sleep mode when I close the cover. In system preferences I can no longer find the option that allows for this energy saving feature. What happened to this option and why is this no longer happening with the latest version of Lion?
Is this the same hardware that used to support closed-lid operation?
Do you have an external monitor and keyboard attached? (closed-lid only works when these are attached, otherwise the system will go to sleep).
No external monitors or devices attached. When you mention that this function only works when devices are attached that is true when you set up your preferences that way. Up until my upgrade to Lion the computer would always go into sleep mode when I closed the lid. There also used to be an option to check in system preferences that allowed you to choose this option. My question for the discussion is what happened to that option and how do you get the computer to sleep or at least the display to sleep when you close the lid as we have been able to do in the past. Thanks.
Do you have wireless keyboard and/or mouse?
You might also have something running that is interfering with sleep.
Open Console, select All Messages, and type "wake reason" into the search field.
I have heard of some third-party software causing it not to sleep, but I can't name any off the top of my head.
See if there are wake codes after you had closed the lid.
I am running OSX Lion 10.7.4 and the computer no longer will go into sleep mode when I close the cover What happened with this option?
