Apple Seeds Second Beta of macOS High Sierra to Developers

Apple today seeded the second beta of an upcoming macOS High Sierra update to developers for testing purposes, a little over two weeks after introducing the new software and releasing the first beta at its 2017 Worldwide Developers Conference.

The new beta can be downloaded from the Apple Developer Center, and once installed, subsequent betas will be available through the Software Update mechanism in the Mac App Store.


macOS High Sierra introduces new core storage, video, and graphics technology. The update supports the new Apple File System (APFS) and High Efficiency Video Codec (HEVC), plus it introduces an updated version of Metal with support for VR and external GPUs.

Photos is being updated with a new sidebar that makes it easier to access editing tools and albums, and there are new editing options like Curves and Selective Color. It also supports external editing apps like Photoshop and Pixelmator, saving changes made in those apps.

Improvements to Safari are coming, including speed enhancements 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 only for registered developers, but Apple plans to make a public macOS High Sierra beta available later this summer, giving public beta testers a chance to try out the software before it sees a public release in the fall.

Related Forum: macOS High Sierra

Popular Stories

Verizon New

Verizon is Down: iPhones Show 'SOS' Mode Due to Network Outage [Resolved]

Wednesday January 14, 2026 10:18 am PST by
Verizon is experiencing a major outage across the U.S. today, with hundreds of thousands of customers reporting issues with the network on the website Downdetector. There are also complaints across Reddit and other social media platforms. iPhone users and others with Verizon service are generally unable to make phone calls, send text messages, or use data over 5G or LTE due to the outage....
iPhone Top Left Hole Punch Face ID Feature Purple

New Leak Reveals iPhone 18 Pro Display Sizes, Under-Screen Face ID, and More

Wednesday January 14, 2026 7:09 am PST by
While the iPhone 18 Pro models are still around eight months away, a leaker has shared some alleged details about the devices. In a post on Chinese social media platform Weibo this week, the account Digital Chat Station said the iPhone 18 Pro and iPhone 18 Pro Max will have the same 6.3-inch and 6.9-inch display sizes as the iPhone 17 Pro and iPhone 17 Pro Max. Consistent with previous...
iPhone Top Left Hole Punch Face ID Feature Purple

iPhone 18 Pro Launching Later This Year With These 12 New Features

Thursday January 15, 2026 10:56 am PST by
While the iPhone 18 Pro and iPhone 18 Pro Max are not expected to launch for another eight months, there are already plenty of rumors about the devices. Below, we have recapped 12 features rumored for the iPhone 18 Pro models, as of January 2026: The same overall design is expected, with 6.3-inch and 6.9-inch display sizes, and a "plateau" housing three rear cameras Under-screen Face ID...
2024 iPhone Boxes Feature

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

Thursday January 15, 2026 11:19 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 United States, according to the company's website. Most of the values declined slightly, but some of the Mac values increased. iPhone ...
maxresdefault

Google Gemini-Powered Siri Will Reportedly Have These 7 New Features

Tuesday January 13, 2026 7:52 pm PST by
Apple and Google this week announced that Gemini will help power a more personalized Siri, and The Information has provided more details. Subscribe to the MacRumors YouTube channel for more videos. As soon as this spring, the report said the revamped version of Siri will be able to… Answer more factual/world knowledge questions in a conversational manner Tell more stories Provide...

Top Rated Comments

Apple_Robert Avatar
112 months ago
Reviews for a Developer's Beta? Seriously?
I thought my humor and apropos smiley made it obvious I was kidding.
Score: 9 Votes (Like | Disagree)
RadioGaGa1984 Avatar
112 months ago
I've been running DP1 on my 2015 rMBP since day 1. It's been incredibly stable. I've had not one issue to speak of.
Score: 4 Votes (Like | Disagree)
godrifle Avatar
112 months ago
I installed on an external USB3 SSD on top of Sierra 10.12.6 beta 4 (I think), and DP1 went smooth as butter. But, then I noticed it didn't update the SSD to APFS. It *did* put it in an APFS container, but the volume was still HFS+. So, I tried to use Disk Utility in Restore 10.13 restore mode, and selected "Update to APFS" and viola... it refused to boot. In fact, if I have the USB drive connected, my Mac refuses to boot no matter what. The only recourse was to blow away the volume, destroy the APFS container, blah blah blah. I then used command line to create APFS container and volume, but can't install directly to the APFS volume. Weird. Will see if DP2 exhibits the same results.
Score: 4 Votes (Like | Disagree)
Apple_Robert Avatar
112 months ago
* After starting a software update, the installation progress may not be displayed for up to fifteen minutes. Do not reboot your Mac during this time.


* The Mac may be stuck at a black screen with a cursor then first time you log in after a software update.

Workaround: Restart your Mac.

Score: 3 Votes (Like | Disagree)
Apple_Robert Avatar
112 months ago
Problems with launching Microsoft Office 15.35 have been resolved.


* There is a known issue where APFS systems with FileVault enabled cannot reset their password with iCloud
* Resizing APFS containers is currently not supported in Disk Utility
* Workaround: In Terminal, use the diskutil tool to resize APFS containers.
* Reinstalling macOS 10.13 from the Recovery OS no longer requires using Disk Utility to unlock your FileVault-encrypted volume.


Score: 3 Votes (Like | Disagree)
Lunfai Avatar
112 months ago
Sketch.app working better?
Mine's fine but I'm not rolling APFS because that's where the problem lies.
Score: 2 Votes (Like | Disagree)