Apple Seeds Third Beta of macOS High Sierra to Public Beta Testers

Apple today seeded the third public beta of an upcoming macOS High Sierra update to public beta testers, two weeks after releasing the second public beta. The third public beta of macOS High Sierra is likely identical the fourth developer beta, which was provided to developers earlier this week.

Beta testers who have signed up for Apple's beta testing program are able to download the third macOS High Sierra beta through the Software Update mechanism in the Mac App Store after the proper profile has been installed.

macos hs beta
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. For instructions on how to install the public beta, check out our how to, and make sure to make a backup before giving the software a try. Don't install the beta on a main machine, as betas are notoriously unstable. High Sierra runs on all machines that support Sierra.

The macOS High Sierra update is designed to improve and refine the existing macOS Sierra operating system. Along with a new, more efficient file system (APFS) designed for modern storage, the update introduces Metal 2, the next-generation version of Apple's Metal graphics API with support for machine learning, external GPUs, and VR content creation.


High Efficiency Video Encoding (HEVC aka H.265) is coming in High Sierra, and many of the existing apps are being updated. Photos features a new persistent side view and editing tools for Curves, Selective Color, and Live Photos, while Siri is gaining a more natural voice and support for more music-related commands.

Safari offers a new autoplay blocking feature for videos and Intelligent Tracking Prevention to protect your privacy, while Mail storage is being optimized to take up 35 percent less space. iMessages can now be stored in iCloud, and there are new iCloud Drive file sharing options and new iCloud storage family plans.

For a full overview of the new features you can expect to see when macOS High Sierra is released in the fall, make sure to check out our macOS High Sierra roundup.

Related Forum: macOS High Sierra

Popular Stories

iOS 18

iOS 18.4 Coming Next Week With These New Features for Your iPhone

Friday February 14, 2025 6:18 am PST by
The first iOS 18.4 beta for iPhones should be just around the corner, and the update is expected to include many new features and changes. Bloomberg's Mark Gurman expects the iOS 18.4 beta to be released by next week. Below, we outline what to expect from iOS 18.4 so far. Apple Intelligence for Siri Siri is expected to get several enhancements powered by Apple Intelligence on iOS...
apple launch feb 2025 alt

What to Expect From the 'Apple Launch' Next Week

Thursday February 13, 2025 11:48 am PST by
Apple has yet to announce any new devices this year, but that could change starting next week. Apple CEO Tim Cook today said to "get ready" for a "launch" on Wednesday, February 19. "Get ready to meet the newest member of the family," said Cook, in a social media post. The post includes an #AppleLaunch hashtag, along with a short video featuring an animated Apple logo inside of a circle....
apple launch feb 2025

Tim Cook Teases an 'Apple Launch' Next Wednesday

Thursday February 13, 2025 8:07 am PST by
In a social media post today, Apple CEO Tim Cook teased an upcoming "launch" of some kind scheduled for Wednesday, February 19. "Get ready to meet the newest member of the family," he said, with an #AppleLaunch hashtag. The post includes a short video with an animated Apple logo inside a circle. Cook did not provide an exact time for the launch, or share any other specific details, so...
iPhone SE 4 Thumb 1

'New' iPhone SE Product Listing Appears on French Website

Wednesday February 12, 2025 6:49 am PST by
As the wait continues for Apple's long-rumored, fourth-generation iPhone SE, French electronics retailer Boulanger has prematurely published a product listing for a "new" model of the iPhone SE. The placeholder page says the device is "coming soon," but it offers no further information, and the price shown is obviously not real. The listing was spotted by a reader of the French technology...
iPhone 17 Pro Render Front Page Tech

iPhone 17 Pro With All-New Camera Bar Design Allegedly Revealed

Thursday February 13, 2025 5:49 pm PST by
Apple's next-generation iPhone 17 Pro will feature three rear cameras arranged in a familiar triangular layout, but the cameras will be housed in an all-new rectangular camera bar with rounded corners, according to YouTube channel Front Page Tech. iPhone 17 Pro camera design render created by Asher for Front Page Tech In a video uploaded today, Front Page Tech host Jon Prosser said the camera ...
M4 Mac mini Apple Video

Apple's Refurbished Mac Mini Pricing Has a Problem

Thursday February 13, 2025 6:20 am PST by
Apple this week began selling refurbished Mac mini models with the M4 chip for the first time, but this has led to a pricing conundrum. In the United States, Apple is offering a refurbished Mac mini with the base M4 chip, 256GB of storage, 16GB of RAM, and Gigabit Ethernet for $509, down from $599 new. This is the standard 15% discount that Apple offers on refurbished Macs. The issue is...
iPhone 16 Apple Store

iPhone 17 in New Sizes This Year: What to Know

Thursday February 13, 2025 2:45 am PST by
Last year, Apple tweaked iPhone 16 Pro screen sizes to make them bigger than 2023's iPhone 15 Pro models, and this year we are also expecting a change in the size of the displays in the iPhone 17 lineup. Here's what we know. Standard iPhone 17 Apple could introduce a new display size for the standard iPhone 17 model in 2025. The iPhone 17 could measure in at 6.3 inches, up from 6.1 inches,...
iphone air concept weis

iPhone 17 Air Could Look Like This in Real Life

Friday February 14, 2025 3:41 am PST by
There have been several alleged leaked details of the iPhone 17 Air, Apple's rumored new slim iPhone, but images have been limited to grainy shots taken in component factories. However, this hyper-realistic concept created by WEIS Studio gives us the best idea yet of what Apple's thin device might actually look like. The concept design is inspired by recent leaks indicating that the device...
Apple Ad on X

Apple Resumes Advertising on X

Wednesday February 12, 2025 2:18 pm PST by
Apple this month started advertising on X for the first time in more than a year. The company had stopped advertising on the social media platform in November 2023 following controversial remarks made by its owner Elon Musk. For example, the @Apple account is running an ad promoting Safari's privacy features. The ad was spotted by MacRumors contributor Aaron Perris. The @AppleTV account has a...

Top Rated Comments

Crazy Badger Avatar
99 months ago
Updated without any issues, but it's too slow to test anything at the minute. Will let Spotlight do it's stuff and play tomorrow, although I did notice iTunes 12.6.2 downloaded with it and that crashes when opening.

I'd be expecting another 2-4 PB's before we're getting close to a GM.
Score: 2 Votes (Like | Disagree)
Lycanthrope Avatar
99 months ago
Sincerely hope this is an improvement on beta 2! Machine has been running like an oven the last couple of weeks...
Score: 2 Votes (Like | Disagree)
jonwatso Avatar
99 months ago
If there are any testers reading this comment; is it close to being released to the public yet?
It runs pretty well, there is the occasional bug but other than that I using it on my daily Mac and I have no issues.
Score: 2 Votes (Like | Disagree)
LarryJoe33 Avatar
99 months ago
Yes, it comes up immediately
Score: 1 Votes (Like | Disagree)
jbachandouris Avatar
99 months ago
Did you reload the update page in the App store? (cmd+r), it never shows for me either if i just click on the update tab
Reloaded several times. Quit app store and came back to it. No update showed until I re-downloaded the beta profile.

Interesting note: On the updates installed list, it says I have the High Sierra Developer Version 4 installed and Version 3 before that. Usually it says that it's the Public Beta. I realize they are the same, but interesting how it's now listed as the Developer Beta on my machine. I assure you, I am not a developer.
Score: 1 Votes (Like | Disagree)
dogslobber Avatar
99 months ago
I didn’t see the PowerPC build, only Intel?!?
Score: 1 Votes (Like | Disagree)