Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsApple released watchOS 26.4 on March 24, 2026, with build number 23T240. The update adds a one-tap control for starting workouts, support for AirPods Max 2, eight new emoji—including an orca, trombone, landslide, ballet dancer and distorted face—plus bug fixes and security updates.
However, watchOS 26.4 is no longer Apple’s newest release: Apple lists watchOS 26.5, released May 11, 2026, as the latest version as of August 18, 2026. This makes 26.4 a historical release update rather than the current watchOS version.
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What changed in watchOS 26.4?
A one-tap way to start a workout
Apple says a new workout type icon in the Workout app lets users start a workout with a single tap. That can reduce the number of steps needed before recording a run, walk, cycling session, strength workout or another supported activity.
“Workout Shortcut” is a useful shorthand, but it should not be confused with Apple’s Shortcuts app, Siri shortcuts or a new system-wide automation action. Apple describes this feature as a control associated with workout types in the Workout app. Its public release notes do not document a full customization process, nor do they confirm that users can create arbitrary workout shortcuts.
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![Apple Watch Series 11 [GPS 46mm] Smartwatch with Jet Black Aluminum Case with Black Sport Band - M/L. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/416RQ0rtsUL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
It is also distinct from Custom Workout, Pacer and workout suggestions elsewhere in watchOS. The confirmed change is simply the ability to begin a workout with one tap; Apple has not published detailed information about how the icon can be customized or whether every workout type receives an identical control. Apple’s release notes provide the official description.
Support for AirPods Max 2
watchOS 26.4 adds support for AirPods Max 2. This is an accessory-compatibility update, not necessarily a new Apple Watch audio feature. Apple’s summary does not specify additional pairing behavior, workout features or audio improvements, so those should not be assumed.
Eight new emoji
The update adds eight new emoji. Apple’s U.S. summary names several examples, including:
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- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
- Orca
- Trombone
- Landslide
- Ballet dancer
- Distorted face
Apple’s page confirms eight additions but does not list all eight in the cited U.S. release summary. Emoji appearance and support can also vary between apps and devices.
Release date, build and current status
Apple released watchOS 26.4 on March 24, 2026. The build number was 23T240, according to Apple’s developer release listing. Apple’s security-release page also records the March 24 release.
As of August 18, 2026, Apple identifies watchOS 26.5 as the latest version. watchOS 26.5 followed on May 11 and added the Pride Luminance face along with further fixes. If your Apple Watch offers a newer update, install the latest compatible release rather than stopping at 26.4.
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- WHY APPLE WATCH SERIES 10 — Bigger display with up to 30 percent more screen area.* A thinner, lighter, and more comfortable design.* Advanced health and fitness features provide invaluable insights.* Safety features connect you to help when you need it.* Faster charging gives you 80 percent battery in about 30 minutes.*
- ADVANCED HEALTH INSIGHTS — Take an ECG anytime.* Get notifications if you have high or low heart rate or an irregular heart rhythm.* Understand your menstrual cycle and get retrospective ovulation estimates.* See overnight health metrics like heart rate, respiratory rate, and more with the Vitals app.* Track sleep and get notifications if Apple Watch detects signs of sleep apnea.*
- A POWERFUL FITNESS PARTNER — Measure all the ways you move with Activity Rings, which are customizable to match your lifestyle. Get advanced metrics for a range of workouts with the Workout app. Track the intensity of your workouts with training load. Use depth and water temperature sensors for your aquatic adventures. And Apple Watch comes with three months of Apple Fitness+ free.*
- STAY CONNECTED — Send a text, take a call, listen to music and podcasts, use Siri, and get notifications on the go. Apple Watch Series 10 (GPS) works with your iPhone or Wi-Fi to keep you connected.
- INNOVATIVE SAFETY FEATURES — Fall Detection and Crash Detection can connect you with emergency services in the event of a hard fall or a severe car crash. Emergency SOS lets you call for help with the press of a button.* Check In automatically notifies a loved one when you’ve arrived at your destination.*
Apple developer release listings and Apple’s security releases page provide the release and version details.
Which Apple Watch models support watchOS 26.4?
Apple’s watchOS 26 compatibility guidance covers:
- Apple Watch Series 6 and later
- Apple Watch SE 2 and later
- Apple Watch Ultra and later
Apple’s security documentation specifically identifies watchOS 26.4 for Apple Watch Series 6 and later, while the broader watchOS 26 compatibility guidance includes the SE and Ultra families above. Feature availability can vary by model.
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- This pre-owned product is not Apple certified, but has been professionally inspected, tested and cleaned by Amazon-qualified suppliers.
- There will be no visible cosmetic imperfections when held at an arm’s length. There will be no visible cosmetic imperfections when held at an arm’s length.
- This product will have a battery which exceeds 80% capacity relative to new.
- Accessories will not be original, but will be compatible and fully functional. Product may come in generic Box.
- This product is eligible for a replacement or refund within 90 days of receipt if you are not satisfied.
watchOS 26 also requires:
- iPhone 11 or later, or iPhone SE 3rd generation or later
- iOS 26 or later
Apple Watch Series 5, the first-generation Apple Watch SE and older models are not eligible for watchOS 26. An eligible watch still needs a compatible paired iPhone running the required iOS version. See Apple’s watchOS update and compatibility guidance and Apple Watch model compatibility table.
How to install watchOS 26.4
Update through the paired iPhone
- Update the iPhone to the latest compatible version of iOS.
- Connect the iPhone to Wi-Fi.
- Open the Watch app.
- Tap My Watch, then General.
- Tap Software Update.
- Download and install the available update.
- Enter the iPhone or Apple Watch passcode if prompted.
Keep the Apple Watch on its charger and the iPhone nearby until installation finishes. Apple recommends at least 50% battery on the watch. The process may take several minutes to an hour.
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- Connect the Apple Watch to Wi-Fi.
- Open Settings on the watch.
- Tap General, then Software Update.
- Tap Install if an update is available.
- Keep the watch on its charger and follow the onscreen instructions.
What to do if the update will not install
If the update does not begin or fails during preparation, work through Apple’s recommended recovery steps:
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- STAY CLOSER TO YOUR HEART HEALTH—The most accurate heart rate sensing in a wearable,* Series 12 now measures HRV as often as every five minutes for insights on stress and recovery, and takes background heart rate readings every five seconds.
- A FULL-FEATURED HEALTH TRACKER—Better understand your body with invaluable health insights. View your overnight health metrics with the Vitals app and get a daily sleep score,* track your menstrual cycle,5 and take readings of your blood oxygen.*
- CHECK YOUR READINESS FOR THE DAY—Know when to rest or put yourself to the test. The readiness experience can help you determine your capacity to take on the day by analyzing your recent activity, vitals, and sleep.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, and Workout Buddy powered by Apple Intelligence from your nearby iPhone8—Series 12 helps you stay active, from running to hiking to strength training.
- KEEP HELP CLOSE AT HAND—A smartwatch that puts your safety first. Series 12 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.*
- Confirm that the watch is sitting correctly on its charger and charging.
- Restart the Apple Watch.
- Restart the paired iPhone.
- Make sure the iPhone is updated, connected to Wi-Fi and close to the watch.
- Try the update again.
If it still will not start, open Watch > My Watch > General > Storage on the iPhone and delete the downloaded update file. Then return to Software Update and retry.
Other common causes include insufficient battery, inadequate storage, a stale or corrupted download, a watch that is not detecting its charger, or a beta profile still installed. If you have installed beta software, remove the beta profile and restart both devices before checking for the update again.
Apple’s normal user update process does not provide a downgrade option after watchOS has been installed, so install beta or release software only when you are prepared to remain on that version until a later update becomes available.
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For users who were choosing whether to install it at release, watchOS 26.4 was a modest point update rather than a major redesign.
- Frequent Workout app users: The one-tap control is the clearest practical reason to update, although the time saved may be only a few taps per session.
- AirPods Max 2 owners: Support makes the update relevant if you want to use those headphones with the watch.
- People who use emoji frequently: The update adds eight emoji, though Apple’s cited U.S. summary names only five examples.
- Security-conscious users: The release includes security updates as well as fixes.
- Owners of unsupported watches: Updating is not an option on Series 5, the first-generation SE and earlier models. A new watch is not required for eligible Series 6-and-later owners.
- Readers updating now: Check for the latest compatible watchOS release, since 26.5 has superseded 26.4.
Apple’s official material confirms the listed features, compatibility and release details. It does not establish changes to battery life, performance, customization, workout-type coverage or model-specific bugs.
