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Question: system preferences unlock error

  • Macbook pro 13'' , 2.3 GHz Intel Core i5, 8 GB 2133 MHz LPDDR3, 128gb
  • MacOS High Sierra
  • can't unlock all system preferences to make changes
  • tried user name and password that I log in to this Macbook

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Mar 17, 2018 8:50 PM in response to florencetham In response to florencetham

Might be a corrupt .plist.


Do a backup, preferably 2 backups on 2 separate drives.


Quit System Preferences.


Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library. Then go to Preferences/com.apple.systempreferences.plist. Move the .plist to your desktop.


Restart the computer, open the application, and test. If it works okay, delete the plist from the desktop.


If the application is the same, return the .plist to where you got it from, overwriting the newer one.


Thanks to leonie for some information contained in this.

Mar 17, 2018 8:50 PM

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Question: system preferences unlock error