Apple Seeds Third Beta of New watchOS 4 Operating System to Developers

Apple today seeded the third beta of an upcoming watchOS 4 update to developers, just over three weeks after seeding the second beta and more than a month after introducing the new update at its 2017 Worldwide Developers Conference. The new version is build 15R5321h.

Once the proper configuration profile has been installed from the Apple Developer Center, the watchOS 4 beta can be downloaded through the dedicated Apple Watch app on the iPhone by going to General --> Software update.


To install the update, the Apple Watch must have 50 percent battery, it must be placed on the charger, and it must be in range of the iPhone.

watchOS 4 features three new watch faces, including a dedicated Siri watch face that displays dynamic information unique to each individual and is perhaps the most significant new feature in the update. There are also new complications for Now Playing and Apple News, and an enhanced Workout app that supports High Intensity Interval Training and new swimming options.

Gymkit, a new technology platform, will let the Apple Watch interface with gym equipment for workout data sharing purposes, and the Activity app will offer up intelligent coaching and tailored workout encouragement along with new monthly activity challenges.

Many other small tweaks and changes have been introduced, all of which are outlined in our dedicated watchOS 4 roundup.

watchOS 4 is only available to developers and will not be provided to public beta testers, so non-developers will need to wait until the software is officially released in the fall to try it out.

Related Roundup: Apple Watch 11
Buyer's Guide: Apple Watch (Neutral)

Popular Stories

samsung crease less foldable display ces 2026%402x

Foldable iPhone's Crease-Free Display Tech Spotted at CES 2026

Tuesday January 6, 2026 3:04 am PST by
CES 2026 has just provided a first glimpse of the folding display technology that Apple is expected to use in its upcoming foldable iPhone. At the event, Samsung Display briefly showcased its new crease-less foldable OLED panel beside a Galaxy Z Fold 7, and according to SamMobile, which saw the test booth before it was abruptly removed, the new panel "has no crease at all" in comparison. The ...
iphone 17 models

No iPhone 18 Launch This Year, Reports Suggest

Thursday January 1, 2026 8:43 am PST by
Apple is not expected to release a standard iPhone 18 model this year, according to a growing number of reports that suggest the company is planning a significant change to its long-standing annual iPhone launch cycle. Despite the immense success of the iPhone 17 in 2025, the iPhone 18 is not expected to arrive until the spring of 2027, leaving the iPhone 17 in the lineup as the latest...
AirPods Pro 3 Year of the Horse Feature

Apple Launches Year of the Horse AirPods Pro 3 for Lunar New Year

Monday January 5, 2026 11:28 am PST by
Apple has designed a limited edition version of the AirPods Pro 3 to celebrate Lunar New Year, and customers in select countries can purchase them starting today. The Year of the Horse Special Edition AirPods Pro 3 feature a unique horse emoji character that's otherwise unavailable. Customers in China, Hong Kong, Taiwan, Malaysia, and Singapore are able to buy the AirPods, and they'll be...
Apple Card iPhone 16 Pro Feature

Apple Card Will Move From Goldman Sachs to JPMorgan Chase

Wednesday January 7, 2026 12:57 pm PST by
JPMorgan Chase has reached a deal to take over operation of the Apple Card, reports The Wall Street Journal. Barring any "last minute hiccups," the deal should be announced shortly after over a year of negotiations. Reports began circulating over two years ago that current Apple Card issuer Goldman Sachs was looking to end its partnership with Apple as part of an effort to scale back on...
Logitech MX Master 3S

Logitech Blames 'Inexcusable Mistake' After Certificate Expiry Breaks macOS Apps

Wednesday January 7, 2026 5:27 am PST by
Logitech users on macOS found themselves locked out of their mouse customizations yesterday after the company let a security certificate expire, breaking both its Logi Options+ and G HUB configuration apps. Logitech devices like its MX Master series mice and MX Keys keyboards stopped working properly as a result of the oversight, with users unable to access their custom scrolling setup,...
m4 macbook air blue 2

iPadOS and macOS 26.2 Double 5GHz Wi-Fi Bandwidth for Wi-Fi 6E Devices

Monday January 5, 2026 1:57 pm PST by
With the release of iPadOS 26.2 and macOS Tahoe 26.2, Apple has improved the Wi-Fi speeds for select Macs and iPads that support Wi-Fi 6E. Updated Wi-Fi connectivity specifications are listed in Apple's platform deployment guide. The M4 iPad Pro models, M3 iPad Air models, A17 Pro iPad mini, M2 to M5 MacBook Pro models, M2, M3, and M4 MacBook Air models, and other Wi-Fi 6E Macs and iPads now ...
ChatGPT Health Integration Connectors Feature

OpenAI Launches ChatGPT Health With Apple Health Integration

Wednesday January 7, 2026 11:27 am PST by
OpenAI today announced the launch of ChatGPT Health, a dedicated section of ChatGPT where users can ask health-related questions completely separated from their main ChatGPT experience. For more personalized responses, users can connect various health data services such as Apple Health, Function, MyFitnessPal, Weight Watchers, AllTrails, Instacart, and Peloton. Last month, MacRumors discovere...
anker new charger 2026

Anker Introduces Pre-Order Discounts on 2026 Nano Chargers, Alongside Big New Year's Sale

Monday January 5, 2026 10:17 am PST by
Anker announced a new series of products at CES this week, and most of them will begin rolling out to customers later in January. A few of these devices, including the Nano Docking Station and 45W Nano Charger, have pre-order discounts on Anker's website, and we're also tracking big discounts in Anker's New Year's sale. Note: MacRumors is an affiliate partner with some of these vendors. When...

Top Rated Comments

honglong1976 Avatar
111 months ago
Installed and left over night.

Woke up and progress was on 100% on the ring / apple watch. Waited another hour. Nothing. Pressed crown and side button till it turned off. Turned on, entered pin and working again.

One to watch out for if anyone gets those symptoms. :)

For a second I thought it had bricked! phew!
Score: 4 Votes (Like | Disagree)
TimUSCA Avatar
111 months ago
Holy crap, that's a nice surprise! Here's hoping it solves my battery dying in just a few hours.
Score: 4 Votes (Like | Disagree)
anticipate Avatar
111 months ago
Try to activate camera app on watch, and then search again
Oddly that worked eventually. Thanks!!
Score: 3 Votes (Like | Disagree)
44267547 Avatar
111 months ago
Much needed. Slightly later than expected, but here none the less.
Score: 2 Votes (Like | Disagree)
vbctv Avatar
111 months ago
The release isn't even showing up in updates yet so it may have just been released. It keeps saying watchOS 4 is up to date.
Score: 2 Votes (Like | Disagree)
HopefulHumanist Avatar
111 months ago
Finally! Hope it solves the battery drain.

The release isn't even showing up in updates yet so it may have just been released. It keeps saying watchOS 4 is up to date.
I am seeing the same too.
Score: 2 Votes (Like | Disagree)