Apple Seeds Ninth Beta of macOS High Sierra to Developers - MacRumors
Skip to Content

Apple Seeds Ninth Beta of macOS High Sierra to Developers

Apple today seeded the ninth beta of an upcoming macOS High Sierra update to developers for testing purposes, four days after seeding the eighth beta and more than two months after introducing the new software at the 2017 Worldwide Developers Conference.

The ninth beta of macOS High Sierra 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 builds on features first introduced in macOS Sierra, focusing on new storage, video, and graphics technology. It brings a new Apple File System (APFS), High Efficiency Video Codec (HEVC), and an updated version of Metal with support for VR and external GPUs.


Several apps are gaining new features in macOS High Sierra. The Photos app features a new sidebar 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 back to Photos, and it interfaces with new third-party printing services.

Safari is gaining speed enhancements, an option to prevent autoplay videos, and a new feature that cuts down on cross-site 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 will see a public release in the fall. For a complete overview of changes coming in macOS High Sierra, make sure to check out our dedicated macOS High Sierra roundup.

Related Forum: macOS High Sierra

Popular Stories

Apple Event Logo

Apple to Release These 15 New Products Later This Year

Friday June 12, 2026 7:45 am PDT by
Apple's annual WWDC developers conference is drawing to a close, but there is still a lot to look forward to in the second half of the year. Apple is expected to release at least 15 more products later this year. Now that the more intelligent and personal version of Siri has finally arrived in beta, a full two years after Apple first previewed it at WWDC 2024, we should begin to see some new ...
Apple Lists 250 Changes Across iOS 27 and More Feature

Apple Shares List of 250 Changes Across iOS 27, macOS Golden Gate, and More

Wednesday June 10, 2026 1:34 pm PDT by
During its WWDC 2026 keynote on Monday, Apple briefly showed a slide with hundreds of new features and enhancements coming across iOS 27, macOS 27 Golden Gate, watchOS 27, tvOS 27, and visionOS 27. All of the software updates are currently available as developer betas, and they are expected to be released to all users in September. We already highlighted some of the key new features from the ...
liquid glass app icon

Apple Maps to Get These 10 New Features in iOS 27

Thursday June 11, 2026 5:45 am PDT by
Apple Maps is getting a range of new features in iOS 27, headlined by an upgraded Flyover experience that uses AI to improve the realism and detail of its aerial imagery. Flyover is a longstanding feature of Apple Maps and lets users explore more than 350 cities in 3D with detailed landmarks, roads, parks, and buildings. Apple described the enhanced Flyover in iOS 27 as combining aerial...

Top Rated Comments

MrGimper Avatar
115 months ago
I hope this ships in September. I need it.
Just as 100 other people say “No thanks, I’ll stick with Snow Leopard” :-)
Score: 22 Votes (Like | Disagree)
JeffyTheQuik Avatar
115 months ago
Autostarting videos - The PopUps of the late 2010's.

I hate those freaking things.
Score: 10 Votes (Like | Disagree)
BornAgainMac Avatar
115 months ago
I hope this ships in September. I need it.
Score: 9 Votes (Like | Disagree)
K4LK Avatar
115 months ago
Score: 6 Votes (Like | Disagree)
McFreggle Avatar
115 months ago
The "one week after seeding the eighth beta" in the intro should be "four days after seeding the eighth beta".

Bad copy-paste :-)
Score: 5 Votes (Like | Disagree)
centauratlas Avatar
115 months ago
I hope this ships in September. I need it.
Normally I update at least one machine right away. While I am waiting to get it, I am going to hold off a bit on this one due to the file system (APFS) changes. Hopefully the beta resolves any issues, but I'm going to be cautious.
Score: 4 Votes (Like | Disagree)