What was the main issue fixed in iOS 26.4.1?

iOS 26.4.1 fixed a critical bug where iPhones running iOS 26.4 failed to receive iCloud change notifications, disrupting data synchronization across apps.

Which apps were affected by the iCloud sync bug in iOS 26.4?

Any app built on Apple's CloudKit framework was affected, including third-party applications and Apple's own Passwords app.

Besides the sync bug, what else does iOS 26.4.1 improve?

iOS 26.4.1 enables Stolen Device Protection by default for enterprise users and fixes a bug where the Settings app's in-app search would stop indexing.

Home / Technology / Apple Patches Crucial iCloud Bug in iOS 26.4.1

Apple Patches Crucial iCloud Bug in iOS 26.4.1

9 Apr

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Summary

A critical iCloud sync bug affecting apps has been fixed.
The issue prevented data changes from syncing across devices.
iOS 26.4.1 also improves Settings search and enterprise security.

Apple Patches Crucial iCloud Bug in iOS 26.4.1

Apple has issued iOS 26.4.1, a critical update for iPhone and iPad users that resolves a persistent iCloud synchronization bug. This issue, present since the release of iOS 26.4 two weeks ago, prevented devices from receiving necessary iCloud change notifications, thereby disrupting data syncing across a multitude of applications. The problem specifically impacted apps utilizing Apple's CloudKit framework, leading to inconsistent data across user devices. Notably, Apple's Passwords app experienced issues with its shared passwords feature due to this bug. This update also enhances security by enabling Stolen Device Protection by default for enterprise users and rectifies a separate bug within the Settings app that hindered its search functionality. iOS 26.4.1 is available for all current iPhone and iPad models, with build number 23E254. Users are advised to install it manually to ensure immediate restoration of iCloud sync services.

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