Apple stops signing iOS 13.5, preventing jailbreakers from downgrading


iOS 13.5 golden master is available only to developers.
There's no way back.
Photo: Ed Hardy/Cult of Mac

Apple has stopped signing iOS 13.5 after rolling out its newest update, iOS 13.5.1, on June 1.

The company’s latest release patches the vulnerability used by the Unc0ver jailbreak. Those who have already updated their devices no longer have a route back for jailbreaking purposes.

It’s normal practice for Apple to stop signing iPhone and iPad firmware shortly after releasing a new update. This prevents users from installing older releases that could contain performance or security problems.

Usually, the practice doesn’t make much of a difference to anyone. It’s significant with iOS 13.5, however, because that’s the most recent version of iOS that is compatible with the Unc0ver jailbreak.

Apple ditches iOS 13.5

Unc0ver, unlike many previous jailbreaks, supports almost all iOS devices — including iPhone 11, the 2020 iPhone SE, and the newest iPad Pro. It also supported (at the time of its release) the latest versions of iOS.

Apple was quick to address that with iOS 13.5.1, which patches the vulnerability that Unc0ver relies on to gain kernel access and jailbreak your device. With that gone, jailbreaking and installing Cydia is not possible.

Users will now have to wait for new vulnerabilities to be discovered and for Unc0ver to be updated to take advantage of them. But at this point, no one knows how long that might take — or if it will ever happen at all.

If you’re still using iOS 13.5 and you might want to jailbreak at some point in the near future, then, you need to steer clear of iOS 13.5.1.


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