A:Nothing is more frustrating than a mac that won’t sleep, or even worse a mac that won’t wake from sleep and needs to be rebooted losing precious time and waiting for a reboot.
The answer isn’t always simple as there could be a couple reasons. First open the System Preferences and click on the Energy Saver control panel. Now make sure the sliders are on anything but “Never”. If set to “never” the machine will never sleep no matter what.
If you don’t use your mac to receive faxes, click on the Print and Fax tab to check and make sure your mac isn’t awake to watch for incoming faxes. That will also prevent sleep.
While in System Preferences click on the Sharing control panel. Now click on the “Internet” tab. Make sure your mac isn’t sharing an internet connection. If so, click it off by shutting it of with the “Stop” command.
Another reason for insomnia is a damaged preference file most likely a Blue tooth or Power Management preference file. These files are best left to a mac tech like me to dispose of and replace.
One of the most likely culprits is an incompatible card recently added such as a USB card. These cards are usually problems in desktops, not so much portable. Be sure to go to the card’s manufacturer website and make sure you have the latest drivers or software upgrades. Many times people buy “no name” cards and have to info to act on such as technical support for the company. In that case you are stuck with a non functioning card as far as the sleep command goes.
On ibooks and Powerbooks the power manger could also be the reason for a non-sleeping laptop. Each mac portable requires a different way to reset the power manager so it’s best to take it to a mac tech. In the meantime, if your mac does go to sleep but won’t wake there’s a not-so-green temporary answer. That would be to visit the System Preferences as mentioned earlier and click on the Energy Saver control Panel. In this case set the sliders to “Never”. This will prevent the mac from going into a sleep it doesn’t wake from. This should only be a temporary solution until you can get the mac fixed. Sleep is good, saves energy and wear and tear on your computer.
Remember to always reboot your mac at least once a day or better yet just shut it down when down it for more than 8 hours. restarting a mac clears out a lot internal logic clutter and ensures a leaner running mac. Putting a mac to sleep and never rebooting it is a bad habit and can tax the systems RAM supply. Everybody likes a fresh start once a day, so shutdown.
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