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
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.