If file sharing stopped working after yesterday’s Mac update, here’s what to do

UPDATE: Looks like Apple’s re-issue of Security Update 2017-001 most likely addressed the file sharing issue, so there’s nothing you need to do on your end. [H/T, Bryan Lee]

If file sharing stops working, go to this Apple Support knowledge base article.

Short story even shorter, you’ll go to Terminal and enter this line:

sudo /usr/libexec/configureLocalKDC

Follow with your admin password, when prompted, and you should be good to go. This is all a bit of a mess, but kudos to Apple for their rapid response here.



  • Jan Lunddal Larsen

    They already fixed in a rerelease of the Security Update which should be installed automatically.

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