MacOS High Sierra 10.13.6 Released, Security Update 2018-004 for Sierra & El Capitan too

Jul 9, 2018 - 21 Comments

macOS High Sierra updates available

Apple has released macOS High Sierra 10.13.6 to Mac users running the macOS High Sierra operating system. The software update is said to include various bug fixes and security enhancements.

Additionally, Mac users running Mac OS X El Capitan 10.11.6 or macOS Sierra 10.12.6 will find security updates available on those machines, along with a minor update to Safari.

Separately, Apple has also released iOS 11.4.1 update for iPhone and iPad, along with software updates for the Apple Watch, Apple TV, and HomePod.

Download & Install macOS High Sierra 10.13.6 or Security Update 2018-004

Mac users running macOS High Sierra can find the macOS High Sierra 10.13.6 update available now from the Mac App Store Updates section. El Capitan and Sierra will instead find Security Update 2018-004 available as a download to install, along with Safari 11.1.2.

  1. Go to the  Apple menu and select the “App Store”
  2. Go to the “Updates” tab to find the updates to download and install

Always backup a Mac before installing any system software update.

If you are currently running macOS Mojave public beta or another version of macOS then you will not find these updates available to you.

Downloads for MacOS High Sierra 10.13.6 Combo Update, Regular Update, & Security Update 2018-004 for Sierra and El Capitan

Some users may prefer to install with a Combo Update. The following links point to Apple servers where you can download the respective update:

Again, be sure to backup the Mac before installing any software update or security update.

MacOS High Sierra 10.13.6 Release Notes

The release notes for tacos High Sierra 10.13.6 are as follows:

About the macOS High Sierra 10.13.6 Update

This update is recommended for all macOS High Sierra users.

The macOS High Sierra 10.13.6 Update adds AirPlay 2 multiroom audio support for iTunes and improves the stability and security of your Mac. This update is recommended for all users.

AirPlay 2 for iTunes:

– Control your home audio system and AirPlay 2-enabled speakers throughout your house.
– Play music at the same time on multiple AirPlay 2-enabled speakers in your house, all in sync.

Other improvements and fixes:

– Fixes an issue that may prevent Photos from recognizing AVCHD media from some cameras.

– Fixes an issue that may prevent Mail users from moving a message from Gmail to another account.

See Apple Security Updates for detailed information about the security content of this update.

Apple also released iOS 11.4.1 for iPhone and iPad alongside minor software updates for the Apple Watch, the Apple TV, and the HomePod Siri speaker.


Related articles:

Posted by: Paul Horowitz in Mac OS, News


» Comments RSS Feed

  1. pavan says:

    After i have updated to 10.13.6, my internal sound speakers are not showing up.

  2. Gary says:

    2016 MBP tried twice and crashed it and had to reinstall OS. There are other forums that people are experiencing the same failure. Some suggested to boot into recovery and select your boot disk then restart. I will wait until Apple fixes before I try again, wasted over an hour two nights in a row now.

  3. John says:

    I’ve been using 10.13.6 since it was released. Couple weeks ago it started freezing every couple of days, now it’s every couple of hours. I usually use google drive, docs, and R, the stats software. I’ve got lots of RAM, SSD, CPU. I’ve tried the usual remedies, reset PRAM etc. Wonder what it is?

  4. Tom says:

    Hi, updated (about 15 minutes), today my MBPr 13 Mid 2014. Everything went fine, and all seems to be operating correctly.

  5. phredog says:

    I have a dual boot setup on my 2015 macbook air. I run Centos Linux and a heavily modified version of mac OS-X Yosemite. I long disabled many of the built in functionality, and replaced many of the built in apps with third party apps I physically removed the web camera and microphones (I am not a web camera user). The computer has almost no identity as a macbook.

    I accidentally downloaded the “High Sierra” update. It is now sitting on the hard drive. What happens if I install it?

  6. anon says:

    slow login 10.13.6 with combo update

  7. Rudi says:

    Anybody else with Mail issues on MBP? Some accounts suddenly don’t recognize the password any longer and even reentering the password is not accepted. On iPhone they are still fine.

  8. Jonn says:

    After the update, no mailcontent, no apple store content, safari prefs crashes safari, etc.
    tonight rollback from timecapsule.

  9. Shawn S says:

    Is the issue with dual displays(not mirroring) not being detected fixed yet?

  10. Jack H says:

    Installed update on MacBook Pro with no problems.
    I echo comment on Time Machine Backup. Nothing to worry about.

  11. Trang Dao says:

    Failed the download a few times, the files was so huge. Everything was fine as usual when I rebooted.

    Apple should have advised to backup prior to installing the new operating system update, I shall remember next time.

    Hate being controlled by big enterprises.

    • arnnni says:

      Run a time machine backup in the future, you’ll always be backed up. You should be doing this anyway – it has nothing to do with being controlled by big business, it’s just common sense.

    • no way says:

      Apple shouldn’t have to advise to backup, it is basic common sense. No one is controlling you other than yourself. If you are not backing up prior to any updates and regularly, the one and only one to blame is yourself.

  12. arbbbni says:

    Installed fine on my macbook pro. No need for alarm.

  13. Liam says:

    Installed fine ( although it took a lot longer then usual ) on my 13,3 MBP. Also installed properly on my MacPro 3,1 running the ‘macOS High Sierra Patcher Tool’, thankfully Nvidia had a new pascal driver update already available today!

  14. Paul M says:

    Yeah, I updated without incident too. Hope you backed up.

  15. Giorgio says:

    I run the update normally, machine works fine. I guess during your download process internet fail and damage your setup file.

    No problems here, everything run perfect.
    I hope you can fix its asap.


  16. no way says:

    This update is flawed, my MBP and Mini both freeze on reboot to install this on multiple attempts. DO NOT DO THIS UPDATE UNTIL APPLE FIXES IT!!!!!

  17. no way says:

    I made several attempts to do this update last night and this morning, every time it dl but then upon restart freezes my MBP and mini.


    • Paul says:

      Sorry to hear you are having problems with installing this update onto your Macs.

      You could always try installing it again using the macOS High Sierra 10.13.6 Combo Update which you can download from Apple here:

      Often that can remedy a failed update, or work when another update method fails.

      As always, back up your Mac completely before installing any software updates.

Leave a Reply


Shop on and help support OSXDaily!

Subscribe to OSXDaily

Subscribe to RSS Subscribe to Twitter Feed Follow on Facebook Subscribe to eMail Updates

Tips & Tricks


iPhone / iPad



Shop on Amazon to help support this site