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High Sierra File Sharing Error

File Sharing sometimes fails in macOS High Sierra after installing Security Update 2017-001. This should fix it...

Open the Terminal application (in Utilities folder, inside Applications folder).
Enter this command: sudo /usr/libexec/configureLocalKDC
Hit the return key.
Enter your administrator password to authenticate with sudo.
Quit out of Terminal.

Now try an AFP or SMB file sharing connection, which should now work.



My latest blog post: Deontology vs Consequentialism: If we have free speech, personal freedom, equality, and truthfulness we are off to a pretty good start. (posted 2025-10-20).
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Could not connect to MySQL: