Apple Stops Signing iOS 18.6.2, Downgrade Not Possible After iOS 26 Update
Apple has reportedly ended the signing of iOS 18.6.2, meaning that iPhone users who have upgraded to the newly released iOS 26 can no longer revert to the previous version. This change comes just a week after the launch of iOS 26.
What Does Stopping iOS Signing Mean?
When Apple “signs” an iOS version, it confirms that the software has passed the company’s server-side verification, a necessary step for installation on iPhones. Without this verification, the installation is blocked, ensuring that users cannot run older versions of iOS that may be less secure, according to MacRumors.
Downgrades Are No Longer an Option
While Apple does not force users to upgrade to iOS 26, stopping the signing of older versions effectively removes the ability to downgrade for those who have already updated. This policy helps maintain device security and ensures consistency across Apple devices.
The restriction is not limited to iPhones. Apple has also stopped signing iPadOS 18.6.2 and tvOS 18.6, preventing iPad and Apple TV users from returning to older software once they upgrade. Users who have not updated can still remain on iOS 18, but anyone moving to iOS 26 will need to adapt to the new interface and features, as reverting is no longer possible.
Apple follows this approach regularly to ensure that devices run the most secure and optimized software, limiting risks associated with outdated versions.
iOS 26: New Design and AI Features
iOS 26 brings a redesigned interface and expanded use of Artificial Intelligence across supported iPhone models. One of the most noticeable changes is the new “Liquid Glass” design language applied system-wide. This style gives apps, icons, and controls a translucent, glass-like appearance. Apple says this design aims to create a sense of fluidity and uniformity across devices while enhancing the overall visual experience.