Apple Releases iOS 26.4.1 to Fix iCloud Sync Bug

Apple on Wednesday released iOS 26.4.1 and iPadOS 26.4.1, minor software updates for iPhone and iPad users that address a significant bug affecting iCloud data synchronization. The updates, which carry build number 23E254, arrived roughly two weeks after the launch of iOS 26.4 and iPadOS 26.4 on March 24.

According to Apple's release notes, the updates include unspecified bug fixes but no security patches. Developers and users reported that the previous iOS 26.4 version introduced a problem in the CloudKit framework, preventing devices from receiving notifications about changes to iCloud data. This issue disrupted syncing across devices, meaning updates made on one iPhone or iPad, such as password changes or notes in apps, would not automatically appear on others. The glitch impacted Apple's own Passwords app, particularly its shared passwords feature, as well as third-party applications like Drafts that rely on CloudKit for cloud storage.

A thread on Apple's Developer Forums highlighted the severity of the bug, noting that affected devices failed to process silent notifications for data updates, even when changes synced properly to Macs. Developers submitted feedback reports to...