Apple today released the third beta of an upcoming macOS High Sierra 10.13.4 update to public beta testers, one day after seeding the third beta to developers and two weeks after releasing the second 10.13.4 public beta.

Beta testers who have signed up for Apple's beta testing program will be able to download the new macOS High Sierra beta through the Software Update mechanism in the Mac App Store.

macoshighsierra10134beta
Those who want to be a part of Apple's beta testing program can sign up to participate through the beta testing website, which gives users access to iOS, macOS, and tvOS betas.

macOS High Sierra 10.13.4 introduces support for some features that are also available in iOS 11.3, like Messages on iCloud, which uploads all of your iMessages to the cloud. It will also support Business Chat, a feature coming when iOS 11.3 and macOS 10.13.4 are released to the public.

The new macOS update also includes the smoke cloud wallpaper that was previously only available on the iMac Pro, it changes the name of the "iBooks" app to just "Books," and it introduces a warning when opening up a 32-bit app as part of an effort to phase them out.

In the future, Apple plans to phase out 32-bit Mac apps, just like it did with 32-bit iOS apps. Apple says macOS High Sierra is the last version of macOS that will support 32-bit apps without compromises.

Related Forum: macOS High Sierra

Top Rated Comments

Chazzle Avatar
102 months ago
I’m unable to get the update to show up in the App Store. Tried installing the public beta and dev beta profiles several times... Has anyone experienced this and/or has a solution?
Are you already on a beta, or an official release?
Had the same thing happening coming from 10.13.3. This was the first of the 10.13.4 betas that I wanted on my machine, but upon enrolling, installing the utility, and checking for updates, nothing. Tried all sorts of different things and the only thing that worked was to reinstall High Sierra from recovery. Crazy.
Score: 1 Votes (Like | Disagree)
Msivyparrot Avatar
102 months ago
Yet again Youtube.com and the left margin, the screen is not correct under safari technology preview 50...this must be the 12 update and yet this is still not fixed!!!
Score: 1 Votes (Like | Disagree)
Chazzle Avatar
102 months ago
there's a reason it's called beta, right
But...the issue was on an official release, not a beta.
Score: 1 Votes (Like | Disagree)
fischersd Avatar
102 months ago
is it identical to the latest Developer beta?
First comment on the developer article was the build number:
https://www.macrumors.com/2018/02/20/apple-seeds-macos-high-sierra-10-13-4-beta-3/
Same build.
Score: 1 Votes (Like | Disagree)
fischersd Avatar
102 months ago
Well, if someone was hammering the update server, Apple may just have a backoff (ie ignore) option in there.

If people are changing their catalog in terminal, if they have a type-o in the catalog, they won't get the update.

Developer Catalog URL: https://swscan.apple.com/content/catalogs/others/index-10.13seed-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz

Beta Catalog URL: https://swscan.apple.com/content/catalogs/others/index-10.13beta-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz

sudo /usr/sbin/softwareupdate --set-catalog URL

Me, if I wasn't getting the update, I'd set it back to production, leave it for an hour, then set it back to beta and check for an update.

Edit: Oh, and per Beta 3 - nice to see that they fixed the problems with Amazon Prime Video playback in Safari.
Score: 1 Votes (Like | Disagree)

Popular Stories

Apple Logo Top Half

Early iOS 26 Software Leak Uncovers Dozens of Upcoming Apple Features

Monday December 15, 2025 3:05 pm PST by
Software from an iPhone prototype running an early build of iOS 26 leaked last week, giving us a glimpse at future Apple devices and iOS features. We recapped device codenames in our prior article, and now we have a list of some of the most notable feature flags that were found in the software code. In some cases, it's obvious what the feature flags are referring to, while some are more...
apple beta 26 lineup

Apple Leak Confirms Work on Foldable iPhone, AirTag 2, and Dozens More Devices

Monday December 15, 2025 2:05 pm PST by
Last week, details about unreleased Apple devices and future iOS features were shared by Macworld. This week, we learned where the information came from, plus we have more findings from the leak. As it turns out, an Apple prototype device running an early build of iOS 26 was sold, and the person who bought it shared the software. The OS has a version number of 23A5234w, and the first...
iOS 26

iOS 26.3 Beta 1 Features: What's New So Far

Monday December 15, 2025 4:23 pm PST by
Apple is testing iOS 26.3, the next version of iOS 26 that will launch around January. Since iOS 26.3's testing is happening over the holidays, it is a smaller update with fewer features than we've seen in prior betas. We've rounded up what's new so far, and we'll add to our list with subsequent betas if we come across any other features. Transfer to Android Apple is making it simpler...
iOS 26

iOS 26.4 and iOS 27 Features Revealed in New Leak

Friday December 12, 2025 10:56 am PST by
Macworld's Filipe Espósito today revealed a handful of features that Apple is allegedly planning for iOS 26.4, iOS 27, and even iOS 28. The report said the features are referenced within the code for a leaked internal build of iOS 26 that is not meant to be seen by the public. However, it appears that Espósito and/or his sources managed to gain access to it, providing us with a sneak peek...
Apple Foldable Thumb

Leak Reveals Foldable iPhone Details

Monday December 15, 2025 9:09 am PST by
The first foldable iPhone will feature a series of design and hardware firsts for Apple, according to details shared by the Weibo leaker known as Digital Chat Station. According to a new post, via machine translation, Apple is developing what the leaker describes as a "wide foldable" device, a term used to refer to a horizontally oriented, book-style foldable with a large internal display....
iPhone Top Left Hole Punch Face ID Feature Purple

iPhone 18 Pro Features Leaked in New Report, Including Under-Screen Face ID

Tuesday December 16, 2025 8:44 am PST by
Next year's iPhone 18 Pro and iPhone 18 Pro Max will be equipped with under-screen Face ID, and the front camera will be moved to the top-left corner of the screen, according to a new report from The Information's Wayne Ma and Qianer Liu. As a result of these changes, the report said the iPhone 18 Pro models will not have a pill-shaped Dynamic Island cutout at the top of the screen....
airpods max 2024 colors

AirPods Max 2 Likely to Offer These 10 New Features

Monday December 15, 2025 7:41 am PST by
Apple released the AirPods Max on December 15, 2020, meaning the over-ear headphones launched five years ago today. While the AirPods Max were updated with a USB-C port and new color options last year, followed by support for lossless audio and ultra-low latency audio this year, the headphones lack some of the features that have been introduced for newer generations of the regular AirPods and the ...
apple iphone air battery pack

Apple Aims to Boost Popularity of iPhone Air 2 in Two Ways

Tuesday December 16, 2025 11:06 am PST by
We have been covering iPhone 18 Pro, iPhone 17e, and iPhone Fold details from The Information's report about future iPhone models, and next up is the iPhone Air 2. The report says that Apple aims to make the iPhone Air 2 more attractive in two ways. First, Apple is apparently considering adding a second rear camera to the device, which would resolve a key limitation. The current iPhone...