Info/Downloads of macOS 10.13.4, Security Update 2018-002 for El Capitan and Sierra, Safari 11.1
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macOS 10.13.4, Security Updates for Sierra & El Capitan, Safari 11.1
Available via software update and download pages below. Here's info on the macOS 10.13.4 update (build 17E199) from the release notes:
"About the macOS High Sierra 10.13.4 Update
The macOS High Sierra 10.13.4 update improves the stability, performance, and security of your Mac, and it is recommended for all users. This update:

  • Adds support for external graphics processors (eGPUs)
  • Fixes graphics corruption issues affecting certain apps on iMac Pro
  • Adds support for Business Chat conversations in Messages in the US
  • Allows jumping to the right-most open tab using Command+9 in Safari
  • Enables sorting Safari bookmarks by name or URL by right 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 non-encrypted web pages
  • Displays privacy icons and links to explain how your data will be used and protected when Apple features ask to use your personal information

    (For info on Enterprise content, see the About doc below)
    For more detailed information about the security content of this update, please visit:"

  • Doc on security fixes in macOS 10.13.4 and Security Updates for Sierra/El Capitan below.
    (Also article on security fixes in Safari 11.1 for 10.11.6, 10.12.6, 10.13.4.)

    Download pages for macOS 10.13.4 & Security Update 2018-002 updates:
    (Sizes are what's listed on download pages at post time.)

    Related Apple Articles:

    If you're running Security/AV software on your Mac, it may interfere with updates. (Several threads in Apple's forums on major problems updating to 10.13.4 from some users, as usual.) Of course backup your current boot drive before updating. (And a bootable clone is a plus.)

    About eGPU Support in macOS 10.13.4
    Apple has a new support article on using an external graphics processor with your Mac, with a list of supported eGPU configurations (Thunderbolt 3 chassis & graphics card models).
    Here's the list of supported Mac models (doesn't include 2013 Mac Pro with Thunderbolt 2):

    "eGPUs are supported on MacBook Pro notebooks released in 2016 and later(1), iMac computers introduced in 2017 and later, and iMac Pro. Your Mac must also have macOS High Sierra 10.13.4 installed..."

    1. If you're using a 13-inch MacBook Pro from 2016 or later, always plug eGPUs and other high-performance devices into the left-hand ports for maximum data throughput.
    Also has notes on app support & link to developer page on coding apps to support eGPUs.
    (Although Apple only lists support for Thunderbolt 3, for years some pre-Thunderbolt 3 Mac owners have used graphics cards in Thunderbolt cases with modified drivers. Here's an example reader report from 2015 using a Late 2012 MacBook Pro with Thunderbolt 1.)

    FYI on Nvidia Web Driver Updates:
    Users of Nvidia's web drivers should know that new OS updates (versions or later build numbers after Security Updates) break any currently installed Nvidia web graphics driver. I'd switch to the default Apple driver and reboot before updating, if your card is supported with the default drivers. If not, wait for a Nvidia driver update. (Some non-Mac EFI cards are not supported by default OS X drivers.)
    Of course have a current backup (and if possible, a Clone) of your boot drive before any update. (As usual, I'll post download pages for Nvidia updates when spotted.)
    UPDATE: See Mac Nvidia CUDA and Graphics Driver Updates for downloads of new Nvidia CUDA 387.178 and Web Graphics drivers for macOS High Sierra 10.13.4 and new builds of 10.12.6/10.11.6 (after installing Security Update 2018-002 above).

    Feedback on macOS 10.13.4 Update
    - See macOS 10.13.4 Update Problem Reports and Tips.

    iOS 11.3, tvOS 11.3 and watchOS 4.3 Updates
    • iOS 11.3 release notes (long list of changes/improvements)
    • About the security content of iOS 11.3 (updated)
      (List of fixes revised several times. 6 WebKit fixes added May 2nd.)

    • tvOS 11.3 release notes (Apple TV 4K and 4th Gen)
      - Apple TV App: Now available in Brazil and Mexico.
      - Siri now understands Portuguese in Brazil.
      - On Apple TV (4th generation), you can play videos in their original frame rate.
      (That option was already supported on Apple TV 4K. tvOS 11.3 for Apple TV 4K
      supports Sony TV's Dolby Vision "low latency" profile.
    • About the security content of tvOS 11.3 (updated)
      (6 WebKit Entries added May 2nd.)

    • watchOS 4.3 release notes
      This update contains new features, improvements, and bug fixes.
      - Control volume and playback on HomePod from your Apple Watch
      - Restores ability to control music on iPhone
      - Use any orientation for Nightstand charging mode
      - Fixes an issue where Siri music commands were not working for some audio devices
      - Fixes issue where Activity achievements were incorrectly awarded for some users
      - Siri watch face now shows progress towards closing Activity rings and when new songs are added to Apple Music mixes.
    • About the security content of watchOS 4.3 (updated)
      (6 WebKit Entries added May 2nd.)

    FYI: Apple revised their article on Deploying apps in a business environment with iTunes with an updated download of iTunes with built-in App store. Now downloads iTunes v12.6.4 (was 12.6.3). v12.6.4 reportedly allows syncing/backup of iOS 11.3 devices, which v12.6.3 didn't.

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