My MacBook Pro Makes BootUp Noise After Being Plugged in for Long Period of Time

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My MacBook Pro Makes BootUp Noise After Being Plugged in for Long Period of Time

When I leave my MacBook Pro plugged in over night and it falls asleep like normal, when I wake it up, it makes the noise that it makes when you turn it on after its shut down and takes about three to four minutes to actually be able to enter my password and use the computer. It only happens when its plugged in for a long time and is asleep. I thought it was possibly because I had the put hard disks to sleep when possible on, but even after I turned it off, the same thing occured. Any idea why this is happening?

MacBook Pro, Windows 7

Posted on Aug 16, 2013 2:53 PM

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Answer 1

griff w

Level 4

3,622 points

Aug 18, 2013 12:54 PM in response to mbrill

Hi there,

According to the article below, this is expected behavour.

Mac computers: Progress bar appears after waking from sleep

http://support.apple.com/kb/HT1757

With the release of the OS X Mountain Lion v10.8.2 supplemental update 2.0, a new feature was introduced to enter safe sleep after four hours of the computer being connected to AC power. This is an effort to comply with the European Energy Standards (ErP Lot6). This will only occur if there is no wireless or Ethernet activity and no activity from external devices such as USB storage devices. This is normal behavior for the following units:

MacBook Pro (Mid 2012 and later)

MacBook Pro (Retina, Mid 2012 and later)

MacBook Air (Mid 2012 and later)

iMac (Late 2012 and later)

Mac mini (Late 2012 and later)

-Griff W.

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