Apple today seeded the second beta of an upcoming macOS High Sierra 10.13.6 update to developers for testing purposes, two weeks after seeing the first 10.13.6 beta.

The new macOS High Sierra 10.13.6 beta can be downloaded through the Software Update mechanism in the Mac App Store with the proper profile installed.

macos hs beta
We don't yet know what improvements the sixth update to macOS High Sierra will bring, but it likely focuses on bug fixes and performance improvements for issues that were not able to be addressed in macOS High Sierra 10.13.5.

No feature changes were discovered in the first macOS High Sierra 10.13.6 beta, but we'll update this post if new features or notable bug fixes are discovered in the second.

Work on macOS High Sierra is wrapping up, with Apple now shifting focus to the next-generation version of macOS, macOS 10.14, which was unveiled at the Worldwide Developers Conference last week.

Related Forum: macOS High Sierra

Top Rated Comments

Guy Clark Avatar
95 months ago
haha I was so exited that I actually thought or saw that it was Mojave 2nd beta to developers, when I look at the title again I was so disappointed lol
It is better that Apple continue to concentrate on High Sierra as many Macs will not be compatible with Mojave.
Score: 7 Votes (Like | Disagree)
lec0rsaire Avatar
95 months ago
It is better that Apple continue to concentrate on High Sierra as many Macs will not be compatible with Mojave.
I agree. There are many people with very capable 2010 and 2011 machines that have been upgraded and continue to perform well. High Sierra is the only option for these machines to have security updates for the next 3 years or so. It will not be a bad version to stay on since it still has 32-but support and those with older machines definitely have a lot of this stuff. It is possible that they even make a .7 release as the final.
Score: 4 Votes (Like | Disagree)
kissmo Avatar
95 months ago
haha I was so exited that I actually thought or saw that it was Mojave 2nd beta to developers, when I look at the title again I was so disappointed lol
:))

Yeah me too.
But if you remember previous years, Apple tends to release DPs on a bi-weekly basis. In general.... Of course sometimes it took 3-4 weeks between releases as you get closer to the end.
I would actually expect the DP2 next week (usually they release DP2 1 week after the WWDC is over).

High Sierra is sooooo out of fashion :P
Score: 1 Votes (Like | Disagree)
Guy Clark Avatar
95 months ago
I know. They’ve tended to stop at .6. Snow Leopard went to .8 but that was back when they weren’t on a yearly release cycle like they are now. It guess it depends on how good 10.13.6 turns out. The difference with El Capitan and Sierra is that this is the last release that fully supports OpenGL, OpenCL and 32-bit apps. While they probably don’t give a damn you never know.

I’m really looking forward to Mojave. If I had a second Mac I would’ve already installed the beta but I really don’t want to waste time restoring High Sierra in case the beta breaks something I need.
On my late 2015 21.5" 4k iMac I have installed Mojave to an external USB 3.0 partition and it is something else. It is unfortunate that not everyone will get to enjoy it.
Score: 1 Votes (Like | Disagree)
tywebb13 Avatar
95 months ago
Build number is 17G39b
Score: 1 Votes (Like | Disagree)
flyinmac Avatar
95 months ago
My Early-2009 is stuck on El Capitan. I really need to move on.
Early 2009 what??? (as in what is your machine?)

My Early 2009 iMac is running High Sierra just fine (10.13.5). With the usual hacks anyway. But, it works great.

My 2006 Mac Pro 1,1 is stuck on El Capitan.

You could probably bring your machine up to High Sierra if you wanted.
Score: 1 Votes (Like | Disagree)

Popular Stories

iOS 26 on iPhone Feature

Here's When iOS 26 Rolls Out Today in Every Time Zone [Update: Out Now!]

Monday September 15, 2025 12:00 am PDT by
Update 10:06 a.m.: iOS 26 is rolling out now, though it may take a bit for all users to see it, so keep checking! Today's the day! Apple is about to release iOS 26, which will deliver the biggest redesign since iOS 7 and bring a range of new features and improvements to iPhones worldwide. It's Apple's biggest software update of the year, and Apple announced at last week's iPhone event that...
iOS 26 Battery Glass Feature

Apple Says Installing iOS 26 Might Impact Battery Life

Monday September 15, 2025 10:56 am PDT by
In the iOS 26 release notes, Apple is warning iPhone users that installing the new software might have a temporary impact on battery life, which is normal. A new support document explains that major iOS updates require background setup like indexing data and files for search, downloading new assets, and updating apps. Further, Apple says that new features could require more resources,...
Tim Cook Rainbow

Apple Reportedly Plans to Launch These 10 Products in 'Coming Months'

Sunday September 14, 2025 8:45 am PDT by
Apple's annual September event is now in the rearview mirror, with the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, Apple Watch Series 11, Apple Watch Ultra 3, Apple Watch SE 3, and AirPods Pro 3 set to launch this Friday, September 19. As always, there is more to come. In his Power On newsletter today, Bloomberg's Mark Gurman said Apple plans to release many products in the...
AirPods Pro Firmware Feature

AirPods Pro 2 and AirPods 4 Get iOS 26 Features With New Firmware Update

Monday September 15, 2025 10:50 am PDT by
Apple today released updated firmware for the AirPods Pro 2 and the AirPods 4, introducing support for the new AirPods features that are included in iOS 26, iPadOS 26, and macOS Tahoe. The firmware has a build number of 8A356, and it replaces the current 7E93 firmware. With Apple's new software updates, the AirPods Pro 2 and the AirPods 4 support better audio quality for phone calls and...
iOS 26 Feature

iOS 26 Available Now With These 8 New Features

Monday September 15, 2025 5:45 am PDT by
Following three months of beta testing, iOS 26 was released today, September 15. The update is compatible with the iPhone 11 series and newer, and it is available to install via the Settings app, under General → Software Update. Below, we have highlighted eight new features included in iOS 26. Even more new features and changes are outlined in Apple's release notes for the update. Some of ...
iphone 17 lineup

iPhone 17 Models Launch on September 19 With These New Features

Friday September 12, 2025 7:58 am PDT by
Apple will launch its new iPhone 17 lineup and ultra-thin iPhone Air in stores on Friday, September 19, and the company has already shown off the new devices at its fall event, which ran with the the tagline "Awe dropping." The iPhone 17 series brings a host of new features and enhancements. Here's a rundown of the biggest upgrades and changes: iPhone 17 Display Changes The iPhone...