macOS High Sierra Delete plist File

macOS High Sierra Delete plist File

Photo by Ilya Pavlov on Unsplash

Deleting a .plist File May Improve Your Mac’s Performance

Some users in the Mac community find that particular .plist files are responsible for telling your Mac to slow down; for instance, so your battery life can be extended. Technically, the file instructs your Mac’s processor to work at a much slower clock speed than it is usually capable of, thereby resulting in dramatically reduced performance levels.

In some cases, instead of just some minor slowdowns, a .plist file brings about a crawl, leading to performance issues that probably made you find your way here to this page.

Remember, deleting this .plist file is a hack discovered by users after several trial and error methods and not something that is recommended by Apple, at least not officially. However, several hundred users have vouched for this method in forums and various types of online discussions.

Delete a .plist File on an Older OS X

If you are running an older OS X on your Mac, we’ve written about how to find and delete your .plist files. As a quick reminder:

  • Open Finder
  • Select your hard drive
  • Select System > Library  > Extensions
  • Find and locate a text file called IOPlatformPluginFamily.kext
  • Right click on the file and select Show Package Contents
  • Click Contents > Resources > Plugins
  • Right click on ACPI_SMC_PlatformPlugin.kext
  • Right click on it and Show Package Contents
  • Click Contents > Resources
  • Find the .plist file
  • Delete the file
  • Restart your Mac

macOS High Sierra Delete a plist File

In High Sierra that process is slightly different. To find your .plist files in macOS High Sierra:

  • Open Finder,
  • Hold Option,
  • Click on the Go menu,
  • Go to Library > Preferences

macOS High Sierra Delete a .plist File

You can delete the plist file(s) there.

Before Deleting a plist File

We recommend you try a basic Mac cleaning program before attempting to delete a plist file. Our recommendation is Clean My Mac 3. You can also check our list of simple steps to take to speed up your MacBook Air.

Related Posts

About the Author
Kylie Larson is a content wrangler, helping both small businesses and large organizations get their message up and out. When she's not writing and organizing online, you'll find her walking the dog, with a camera in hand, riding the Chicago blue line, and in the midst of a home renovation project that never ends. Connect with her at
  1. Kashif Ashfaque Reply

    Please help me out i cannot find plist file in macOS Sierra….guide me :))

    • Kylie Larson Reply

      Try: Preferences>Advanced + Show Develop. Then try to find the file again.

  2. Joerg Reply

    Hi Kylie,

    Thank you for pointing this out again! In High Sierra under Preferences I find a long list of plist files (mainly named “….plist”. None of them has my MacBooks model in the name. Do I need to delete all files ending .plist?
    Thank you very much for your help!
    Joerg (MacBook slow when not plugged to charger)

    • joerg Reply

      Hi again,
      I found the plist in High Sierra under Extensions.
      I seem to have been in the wrong library folder. Not in the system one. Deleted it after temp disable the SIP. Seems to work, awesome!

Leave a Reply


Anti-Spam Quiz: