Just and addendum: I've noticed that when Energy Saver wakes my iMac up for the scheduled update, the iMac will go back to sleep before the update happens if the wakeup was too early, even if the programmed interval before going to sleep is set for 20 minutes. For example, if I set the computer to wake up 1 minute before SD! is scheduled to back up, it will happen, then the computer will stay awake until 20 minutes after the backup is finished. If I set the computer to wake up, and nothing is done, it goes back to sleep in a minute or so.
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