Apple Locks Users Into iOS 26—Here's Why You Can't Revert Anymore

Apple has officially stopped signing iOS 18.6.2, shutting the door on users who could have downgraded after they've upgraded to iOS 26.

Apple has taken the same step with iPadOS 18.6.2 and tvOS 18.6, a routine move that often frustrates users who find themselves unable to roll back to earlier versions.

What Does 'Stopping Signing' Mean?

When Apple "signs" a software version, it authenticates the update via a server-based verification process. This guarantees the version one is installing is both secure and authorized. After Apple ceases to sign older firmware, devices cannot install it, whether or not the update file exists. In a nutshell, once you go forward, there is no going back.

According to MacRumors analyst Aaron , this only means that you can no longer downgrade from iOS 26.