Apple Seeds Ninth Beta of macOS High Sierra to Developers
Sep 1, 2017 10:06 am PDT by Juli Clover
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 Roundup: macOS High Sierra

Top Rated Comments

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11 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” :-)
Rating: 22 Votes
11 months ago
Autostarting videos - The PopUps of the late 2010's.

I hate those freaking things.
Rating: 10 Votes
11 months ago
I hope this ships in September. I need it.
Rating: 9 Votes
11 months ago
Release notes
Rating: 6 Votes
11 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 :-)
Rating: 5 Votes
11 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.
Rating: 4 Votes
11 months ago

Can anyone speak to the performance of this software on an old HFS+ system? I’m running a late 2011 MacBook Pro, and am wondering whether the conversiom is worth it. My system has an HDD instead of an SSD, so I’d be interested to know if APFS is practical.

All I can say is that if you decide to go the SSD route, the difference in performance will be night and day. Put one a few years ago in my 2011 MacBook Pro and just recently in my brother’s 2010. Unbelievable difference. Highly recommended. High Sierra is incredibly responsive and apps open and load almost instantly on my old machine.
Rating: 3 Votes
11 months ago
How bout an 18-24 month update cycle which would hopefully make OS upgrade cycles a bit more meaningful, provide more time for feature development and require less beta testing. Annual upgrade cycles I think create additional unnecessary debugging.
Rating: 3 Votes
11 months ago
I love the comments on the beta releases which can generally be summarized by answering : 1) Just hold your pants on for a day and you'll see the update and 2) It's not too buggy but it's also not perfect - be careful.
Rating: 2 Votes
11 months ago

I've heard this is really buggy and people are speculating it won't ship in September. Odd, for a "catch-up" on the fundamentals release.

Any views from people who have used the betas?

It's not really buggy.
Rating: 2 Votes

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