Apple Stops Signing Newly Released iOS Updates for Older iPhones

Apple has taken the unusual step of halting signing for several recently released iOS updates, effectively preventing users from installing them even if the options remain visible within the Software Update settings. The affected operating systems include iOS 12, iOS 15, iOS 16, and the latest iOS 18, alongside corresponding iPadOS versions.

The Core Issue: Expiring Certificates

The updates, released on Monday, were designed to address a critical issue: the impending expiration of a key security certificate. According to Apple’s documentation, this certificate is essential for core system services. Without a valid certificate, fundamental functions like iMessage, FaceTime, and Apple Account sign-in could cease to operate after January 2027.

Did You Know? Apple released iOS 12.5.8, an update for devices that originally launched in September 2013, demonstrating continued support for older hardware.

Which Devices Are Affected?

A broad range of Apple devices are impacted by this change. The following iPhone models are unable to install the updates: iPhone SE (1st and 2nd generation), iPhone 5s, iPhone 6 and 6 Plus, iPhone 6S and 6S Plus, iPhone 7 and 7 Plus, iPhone 8 and 8 Plus, iPhone X, iPhone XS and XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, and iPhone 12 models (including mini, Pro, and Pro Max).

iPad users with the following devices are also affected: iPad mini 2, iPad mini 3, iPad Air, iPad Air 2, iPad mini 4, iPad Pro (9.7-inch), iPad Pro (12.9-inch) (1st generation), iPad (5th generation), iPad (7th generation), and iPad (8th generation).

Expert Insight: Apple’s decision to stop signing these updates, despite releasing them to address a critical certificate issue, highlights the complexities of maintaining software compatibility across a diverse range of older devices. It suggests a calculated risk assessment balancing the need for security with the practical limitations of supporting legacy systems.

What Happens Next?

It is possible Apple may re-sign these updates at a later date, though this is not guaranteed. If the company does not, users on affected devices will likely experience disruptions to Apple services – iMessage, FaceTime, and Apple Account sign-in – after January 2027. Users may also encounter compatibility issues with future software or services that rely on the expiring certificate. Alternatively, Apple could introduce a new mechanism to address the certificate issue, but this would likely require a more substantial software update.

Frequently Asked Questions

What prompted these iOS and iPadOS updates?

The updates were released to replace an expiring security certificate, preventing disruptions to core services like iMessage, FaceTime, and Apple Account sign-in.

Do these updates introduce any new features or security enhancements?

No, these updates specifically address the expiring certificate and do not include any new features or security vulnerabilities.

What happens if I cannot install these updates?

After January 2027, services such as iMessage, FaceTime, and Apple Account sign-in may stop working on affected devices if the certificate expires and the update is not installed.

As Apple continues to innovate, how will the company balance supporting older devices with the need to advance its operating systems and security protocols?