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Apple Security Update is recommended for all users and improves the security of OS X. For detailed information about the security content of this update, please visit:

The download link above is for macOS 10.13.1 High Sierra; see Related Links for additional security updates.

What's New

Version 2017-001:

Note: Users are requested to install this update as soon as possible. When you install Security Update 2017-001 on your Mac, the build number of macOS will be 17B1002.

Directory Utility
  • Available for: macOS 10.13 Sierra and macOS 10.13.1 High Sierra
    Not impacted: macOS Sierra 10.12.6 and earlier
    Impact: An attacker may be able to bypass


  • macOS 10.13.1
  • Download for macOS 10.13 in Related Links
  • See Related Links for other system versions

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Apple Security Update User Discussion

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4.5 20


Current Version (2017-001.x)


Downloads 15,972
Version Downloads 959
License Updater
Date 29 Nov 2017
Platform Intel 64 / OS X
Price Free