MacOS High Sierra 10.13.4 Update Released, Security Update 2018-002 for MacOS Sierra & El Capitan

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macOS High Sierra 10.13.4 download

Apple has released macOS High Sierra 10.13.4 for Mac users who are running High Sierra on their computers. Separately, Security Updates 2018-002 for MacOS Sierra and Mac OS X El Capitan are also available for Mac users running prior system software builds.


Additionally, iOS 11.3 update for iPhone and iPad is available to download along with updates to watchOS, tvOS, and HomePod.

The macOS High Sierra 10.13.4 release includes various bug fixes and enhancements to MacOS High Sierra and is therefore recommended to install on any Mac currently running the High Sierra system software. The Security Update 2018-002 packages for El Capitan and Sierra are exclusively for security patches and are also recommended to install for any Mac user running those versions of system software. A new version of Safari 11.1 is also available for the earlier MacOS releases.

Aside form the inclusion of a new cloud wallpaper, there are not many outward changes to macOS 10.13.4, suggesting the latest High Sierra update is mostly aimed for bug fixes and enhancements. The macOS High Sierra 10.13.4 release does start notifying users when running 32-bit apps however, as Apple moves to eventually discontinue support for running older 32-bit applications in Mac OS. You can see what apps are 32-bit on your Mac with these instructions, otherwise when you open a 32-bit app on a Mac running 10.13.4 or later you will see a notification alerting you to update the app. MacOS 10.13.4 also includes support for external GPU hardware.

Full release notes for macOS High Sierra 10.13.4 are included further below.

Download & Install MacOS High Sierra 10.13.4

Always back up a Mac with Time Machine or your backup method of choice before beginning any software update.

  1. Go to the  Apple menu and choose “App Store”
  2. Choose the “Updates” tab and find the “MacOS High Sierra 10.13.4” download available to install (or Security Update 2018-002 if the Mac is running Sierra or El Capitan)

MacOS High Sierra 10.13.4 update

Installing any Mac OS system software update requires the computer to reboot. Installing Security Updates also usually requires a system reboot.

An updated version of iTunes 12.7.4 and Safari 11.1 are also available for Mac users as well, though whether or not you find those available will depend on what version of system software and iTunes is in use on the given Mac.

Security Update 2018-002 update available for Sierra and El Capitan

Package installers for the macOS 10.13.4 Combo Update, Standard Update, and Security Updates for Mac OS Sierra and El Capitan can be downloaded directly from the Apple Support downloads site here as well.

MacOS High Sierra 10.13.4 Release Notes

Release notes for the latest High Sierra build are as follows:

This update is recommended for all macOS High Sierra users.

The macOS High Sierra 10.13.4 Update improves the stability, performance, and security of your Mac, and is recommended for all users. This update:

– Adds support for Business Chat conversations in Messages in the U.S.

– Adds support for external graphics processors (eGPUs).

– Fixes graphics corruption issues affecting certain apps on iMac Pro.

– Allows jumping to the rightmost open tab using Command-9 in Safari.

– Enables sorting of Safari bookmarks by name or URL by Control-clicking and choosing Sort By.

– Fixes an issue that may prevent web link previews from appearing in Messages.

– Helps protect privacy by only AutoFilling usernames and passwords after selecting them in a web form field in Safari.

– Displays warnings in the Safari Smart Search field when interacting with password or credit card forms on unencrypted webpages.

– Displays privacy icons and links to explain how your data will be used and protected when Apple features ask to use your personal information.

Enterprise content:

– No longer disables User Approved Kernel Extension Loading on MDM-enrolled devices. For devices with DEP-initiated or User Approved MDM enrollment, administrators can use the Kernel Extension Policy payload.

– Improves Spotlight search results for files stored on network mounts.

– Properly evaluates ACLs on SMB share points.

– Adds the –eraseinstall flag to the startosinstall command in the macOS Installer app at Contents/Resources/startosinstall. Use this flag to erase and install macOS on a disk. For details, run startosinstall with the –usage flag.

– Updates System Image Utility to allow creating NetInstall images that erase and install macOS to a named target volume.

Separately, iPhone and iPad users can download iOS 11.3, while Apple Watch, Apple TV, and HomePod also has software updates available.

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