---
title: watchOS 26.4 Release Notes
framework: watchos-release-notes
role: article
role_heading: Article
path: watchos-release-notes/watchos-26_4-release-notes
---

# watchOS 26.4 Release Notes

Update your apps to use new features, and test your apps against API changes.

## Overview

Overview The watchOS 26.4 SDK provides support to develop watchOS apps for Apple Watch devices running watchOS 26.4. The SDK comes bundled with Xcode 26.4, available from the Mac App Store. For information on the compatibility requirements for Xcode 26.4, see Xcode 26.4 Release Notes. Address Sanitizer Known Issues Address Sanitizer and Thread Sanitizer might hang on macOS 26.4, iOS 26.4, tvOS 26.4, watchOS 26.4, and visionOS 26.4 when building with Xcode 26.3 or older.  (171762808) Workaround: Use Xcode 26.4 when testing applications with Address Sanitizer or Thread Sanitizer. Apple Maps Known Issues Directions might fail to load on Watch when the companion iPhone is connected.  (168923852) Workaround: Start directions from the companion iPhone. Movement Disorder API Resolved Issues Fixed: The Movement Disorder API has enhanced analytics around database access errors.  (129771567) Networking Resolved Issues Fixed: Multiple processes leak CFRunLoopSource objects when Automatic proxy configuration (PAC) or Auto proxy discovery are configured. For clients of the CFNetworkExecuteProxyAutoConfigurationURL and CFNetworkExecuteProxyAutoConfigurationScript API, please check to make sure your process is not working around the leak by overreleasing the CFRunLoopSourceRef returned by those functions or the CFArrayRef and CFErrorRef passed to the completion.  (166839810) (FB21376045) StoreKit New Features New fields revocationType and revocationPercentage have been added to Transaction.  (148858551) Resolved Issues Fixed: Purchase Intents might not be emitted from the intents sequence when the app is launched from the background.  (168958783) (FB21767675) SwiftUI Resolved Issues Fixed: SwiftUI does not surface the latest .userActivity as the current user activity.  (163136831) Workout Resolved Issues Fixed: When you start a workout with Workout Buddy enabled, the timer might appear to be delayed by a few seconds before it starts counting.  (169030068)

## See Also

### watchOS 26

- [watchOS 26.6 Beta Release Notes](watchos-release-notes/watchos-26_6-release-notes.md)
- [watchOS 26.5 Release Notes](watchos-release-notes/watchos-26_5-release-notes.md)
- [watchOS 26.3 Release Notes](watchos-release-notes/watchos-26_3-release-notes.md)
- [watchOS 26.2 Release Notes](watchos-release-notes/watchos-26_2-release-notes.md)
- [watchOS 26.1 Release Notes](watchos-release-notes/watchos-26_1-release-notes.md)
- [watchOS 26 Release Notes](watchos-release-notes/watchos-26-release-notes.md)