What is this noise?

Discussion in 'iMac' started by hauck.josh, Apr 3, 2018.

  1. hauck.josh macrumors newbie

    hauck.josh

    Joined:
    Mar 9, 2017
    #1
    Hello,

    each time my iMac shuts down, I hear this noise coming from the speakers or fan. I hear it louder when plugged into a speaker set. The person on the Apple Care Support call said that there might be an issue with the fan, but I think it could be something else. Any ideas what it is? I have attached a link to a recorded video:


    https://photos.app.goo.gl/Rj5gfy1qK4KxtTpU2



    Please help me out.
     
  2. WilliamG macrumors G3

    Joined:
    Mar 29, 2008
    Location:
    Seattle
    #2
    Sounds like a hard drive shutting off.
     
  3. hauck.josh thread starter macrumors newbie

    hauck.josh

    Joined:
    Mar 9, 2017
    #3
    Okay. It never made that noise beforehand. I am taking it to the apple genius bar to see why it is audible.
     
  4. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #4
    Is there a difference when you do a normal shutdown (and not the hard, emergency shutdown that you do when you press and hold the power button)
    Anyway, what I hear sounds like a hard drive noise. Probably something completely ordinary when you get your ear quite close to the back of your iMac - not where you would usually monitor anything, anyway.
     
  5. hauck.josh thread starter macrumors newbie

    hauck.josh

    Joined:
    Mar 9, 2017
    #5
    It only happens when I do an emergency shut down, if the Mac has a crash, and when the iMac gets updated.
    --- Post Merged, Apr 3, 2018 ---
    I did it again and I can clearly hear the noise coming from my rugged LaCie External HD right near where the fan is! Problem solved. How can I tell if my External HD is damaged as it never made that noise before?
     
  6. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #6
    Damaged? Not likely that faint noise indicates anything at all.
    Or, just a spinning hard drive that is showing a bit of age.
    But, you can run Disk Utility/First Aid on that external, or something more capable, like Disk Warrior.
    LaCie support might even have a suggestion for something that can reassure you, I don't know.
     
  7. WilliamG macrumors G3

    Joined:
    Mar 29, 2008
    Location:
    Seattle
    #7
    If I hard shut down my iMac, any hard drives attached or inside make that noise.

    Heck, I'd tell you not to worry just because I TOLD YOU it was the hard drive. :D

    I believe that noise is because the drive doesn't get a chance to park its heads because you're essentially pulling the plug on the power. Feel free to run a drive check, but I doubt anything is wrong.
     
  8. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #8
    Agree with William G above.
    Nothing is wrong.
    Taking it to an Apple Store will prove to be an exercise in futility.
     

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