in Genius Bar edited January 2014

Does anyone know what this is HDAPM?  Thanks


  • Reply 1 of 3

    This is probably the only relevant thing.


    I'm not sure why you'd want or need this, as ATA drives are long dead.

  • Reply 2 of 3


    A Mac OS X utility for setting the power management (APM) level on ATA hard drives.

    It can be used to eliminate "chirping" or "clicking when idle" noises in some HDDs.



    • OS X 10.5 or higher.

    • ATA/SATA hard disk with APM support.

    • Does not work with external USB or Firewire drives.




    Further information can be found in the usage guide.




    New! (Aug 25, 2012) version 1.2.

    • Improved support for systems with multiple drives.

    • Detects all APM compatible drives automatically (No need to edit .plist file for Optibays, Mac Pros, etc).

    • New uninstall script.



    Installer Package


    Source code

  • Reply 3 of 3
    marvfoxmarvfox Posts: 2,275member

    Thanks for this information. I have a MM 2011 model and it started to make clicking noises 2 days ago. When I downloaded this the clicking now i hear maybe once or twice not like before loud through my computer speakers.


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