Apple stops signing iOS 26.5.1 after critical security fix release

Apple has halted the signing process for iOS 26.5 and 26.5.1, effectively blocking any downgrades from newer versions following the release of a crucial security update last week. This move ensures that users are compelled to update to the latest security patch, addressing significant vulnerabilities that could have been exploited. With this decision, Apple emphasizes its commitment to maintaining robust security across its devices, although it may inconvenience users who previously relied on older versions for specific needs.