Why doesn't my iMac wake from sleep?

Episode 1030 (1:18:04)

Howard from Chatsworth, CA

Howard's iMac goes to sleep overnight and he can't wake it up unless he resets the computer. Leo says that he should try to reset the PRAM. If that doesn't work, another thing that Howard can do is update to Mavericks. He might want to wait on that because it has trouble with a few things like Apple Mail. He should also check the Energy Saver preferences. Leo says it's a pretty common problem.

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