Apple Seeds Third Beta of macOS High Sierra to Developers

Apple today seeded the third beta of an upcoming macOS High Sierra update to developers for testing purposes, more than two weeks after seeding the original second beta and over a month after introducing the new software at its 2017 Worldwide Developers Conference.

The new beta can be downloaded from the Apple Developer Center or over-the-air using the Software Update mechanism in the Mac App Store.

macOS High Sierra focuses on new core storage, video, and graphics technology, introducing a new Apple File System (APFS), High Efficiency Video Codec (HEVC) and an updated version of Metal with support for VR and external GPUs.


Some apps are also gaining new features. Photos is being updated with a new sidebar that's designed to make it easier to access editing tools and albums, and there are new filters and editing options like Curves and Selective Color. Photos also supports external editing apps like Photoshop and Pixelmator, saving changes made in those apps, and it interfaces with third-party printing services.

Safari is gaining speed enhancements, an option to end autoplay video, and a new feature that puts a stop to data tracking. Siri in macOS High Sierra has expanded music capabilities and a new, more natural voice, and Spotlight supports flight status information. There are also improvements to iCloud, FaceTime, Messages, and Notes.

macOS High Sierra is available for both registered developers and public beta testers, and it's likely a new public beta that's identical to the third developer beta will be released later this week.

Related Forum: macOS High Sierra

Popular Stories

2024 iPhone Boxes Feature

Apple Adjusts Trade-In Values for iPhones, iPads, Macs, and More

Thursday November 6, 2025 11:12 am PST by
Apple today updated its trade-in values for select iPhone, iPad, Mac, and Apple Watch models. Trade-ins can be completed on Apple's website, or at an Apple Store. The charts below provide an overview of Apple's current and previous trade-in values in the U.S., according to its website. Maximum values for most devices either decreased or saw no change, but the iPad Air received a slight bump. ...
Liquid Glass General Feature

Apple Shares Liquid Glass Design Gallery

Thursday November 6, 2025 2:45 pm PST by
Apple is promoting the new Liquid Glass design in iOS 26, showing off the ways that third-party developers are embracing the aesthetic in their apps. On its developer website, Apple is featuring a visual gallery that demonstrates how "teams of all sizes" are creating Liquid Glass experiences. The gallery features examples of Liquid Glass in apps for iPhone, iPad, Apple Watch, and Mac. Apple...
iOS 26

iOS 26.1 Available Now With These 8 New Features

Monday November 3, 2025 5:54 am PST by
Following more than a month of beta testing, Apple released iOS 26.1 on Monday, November 3. The update includes a handful of new features and changes, including the ability to adjust the look of Liquid Glass and more. Below, we outline iOS 26.1's key new features. Liquid Glass Toggle iOS 26.1 lets you choose your preferred look for Liquid Glass. In the Settings app, under Display...
airtag purple

Apple's Website Lists AirTag 4-Pack at Shockingly Low Price [Updated]

Friday November 7, 2025 6:40 am PST by
Apple's online store in the U.S. is suddenly offering a pack of four AirTags for just $29, which is the same price as a single AirTag. This is likely a pricing error, and it is unclear if orders will be fulfilled. Apple has not discounted the AirTag four-pack in any other countries that we checked. Delivery estimates are already pushing into late November to early December, suggesting...
Finder Siri Feature

Apple's New Siri Will Be Powered By Google Gemini

Wednesday November 5, 2025 11:57 am PST by
The smarter, more capable version of Siri that Apple is developing will be powered by Google Gemini, reports Bloomberg. Apple will pay Google approximately $1 billion per year for a 1.2 trillion parameter artificial intelligence model that was developed by Google. For context, parameters are a measure of how a model understands and responds to queries. More parameters generally means more...
apple watch se 3 always on

Apple to Remove iPhone-Apple Watch Wi-Fi Sync in EU With iOS 26.2

Thursday November 6, 2025 4:37 am PST by
Apple in iOS 26.2 will disable automatic Wi-Fi network syncing between iPhone and Apple Watch in the European Union to comply with the bloc's regulations, suggests a new report. Normally, when an iPhone connects to a new Wi-Fi network, it automatically shares the network credentials with the paired Apple Watch. This allows the watch to connect to the same network independently – for...
ikea smart home devices

IKEA Debuts 21 HomeKit-Compatible Smart Bulbs, Sensors, and Controls

Thursday November 6, 2025 4:08 pm PST by
IKEA today announced the upcoming launch of 21 new Matter-compatible smart home products that will be able to interface with HomeKit and the Apple Home app. There are sensors, lights, and control options, all of which will be reasonably priced. Some of the products are new, while some are updates to existing lines that IKEA previously offered. There are a series of new smart bulbs that are...
Home Hub Command Center with Dome Base Feature

Apple's 2026 Smart Home Revamp: All the Rumors

Wednesday November 5, 2025 3:54 pm PST by
It's been over a decade since Apple's HomeKit smart home platform launched, and it is overdue for an update. HomeKit and the Home app can no longer keep up with AI-powered solutions from other companies like Google and Amazon, but that's set to change with a smart home revamp that Apple has planned for 2026. Home Hub Apple is working on a home hub or "command center" that will serve as a...
apple tv logo physical

New Apple TV Intro Was Made With Practical Effects

Thursday November 6, 2025 7:02 am PST by
The all-new intro sequence for Apple TV was made with practical effects and shot in-camera, Ad Age reports. Rather than using digital techniques, the new sequence was made by shooting large glass versions of the Apple TV logo, with physical motion and changing lighting used to create effects. Apple partnered with TBWA\Media Arts Lab to create the intro. Ad Age released an exclusive look...

Top Rated Comments

tywebb13 Avatar
109 months ago
Please elaborate, what storage deletion bug?
It had to do with apfs versions of high sierra and time machine not freeing up space. So they had to disable time machine in the previous beta. So now they have fixed it they have re-enabled time machine in this beta.
Score: 6 Votes (Like | Disagree)
nutmac Avatar
109 months ago
Dont use on mac its still major buggy not good for your machine
A sound advice for any primary devices. But I find macOS High Sierra betas to be among the most stable macOS betas (not without issues, of course).
Score: 5 Votes (Like | Disagree)
tywebb13 Avatar
109 months ago
Excellent! Fingers crossed that the storage deletion bug is fixed.
Seed note says it is fixed.
Score: 5 Votes (Like | Disagree)
mmomega Avatar
109 months ago
Stable is not the would I would use to describe it either. This crash happened for me just yesterday, and WindowServer must've crashed at least twice for me in beta 2.
This is one of the few developer previews at least the last 6 years where 'it seems' that I spend more time on the machine reporting bugs than actual work.

A lot of the issues are somewhat based around RAM issues. Primarily where non-stock RAM machiens that have been running 100% rock solid day in and day out are now panicking and crashing every 20-30 hours.
Score: 5 Votes (Like | Disagree)
tkermit Avatar
109 months ago
my Mac doesn't have the disk space to download the new beta to fix the APFS space concern.
How ironic. :)
Score: 4 Votes (Like | Disagree)
xgman Avatar
109 months ago
A sound advice for any primary devices. But I find macOS High Sierra betas to be among the most stable macOS betas (not without issues, of course).
You have got to be kidding? Parallel Universe maybe?
Score: 4 Votes (Like | Disagree)