Repair file sharing after Security Update 2017-001 for macOS High Sierra 10.13.1

If file sharing doesn’t work after you install Security Update 2017-001, follow these steps. 

If you experience issues with authenticating or connecting to file shares on your Mac after you install Security Update 2017-001 for macOS High Sierra 10.13.1, follow these steps to repair file sharing:

  1. Open the Terminal app, which is in the Utilities folder of your Applications folder.
  2. Type sudo /usr/libexec/configureLocalKDC and press Return. 
  3. Enter your administrator password and press Return.
  4. Quit the Terminal app. 
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