Following the discovery of a critical bug in macOS High Sierra that allowed anyone to gain root access to a Mac, Apple has quickly released a mandatory software update to patch the vulnerability. Unfortunately, some users have encountered issues with authenticating or connecting to file shares on their Mac immediately after installing the security update 2017-001.

While this specific bug will be addressed in an upcoming software update, Apple has offered a temporary workaround to fix the issue in the interim.

Fix file sharing bug after installing macOS High Sierra security update

1) Open the Terminal app.

2) Type or simply copy the following line, then hit Return.

sudo /usr/libexec/configureLocalKDC

3) Enter your admin password, then hit Return.

4) Quit Terminal.

This bug only affects a small population of Mac users, but it nevertheless marks a streak of bad luck for Apple — or poor quality control, depending how you look at it. Still, I’ll take that file sharing bug any day over the immense risk of having people gain root access to my machine.

Have you been impacted by this file sharing issue? If so, let us know how these instructions helped.

  • Felipe Queiroz Drumond

    This security update is not available to me. Apple and its bugs!