Install this macOS Security Update Now!

If you have macOS High Sierra, install the available security update from the Updates tab in the App Store. This update fixes a vulnerability described on the page linked below:

Security Update 2017-001

About the security content of Security Update 2017-001

Available for: macOS High Sierra 10.13.1

Not impacted: macOS Sierra 10.12.6 and earlier

Impact: An attacker may be able to bypass administrator authentication without supplying the administrator’s password

https://support.apple.com/HT208315


UPDATE:

Some users have reported an issue with file sharing after installing the Security Update linked above. If you’re one of them, don’t worry, Apple has posted a fix in this article:

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

https://support.apple.com/HT208317

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