Bad news, jailbreakers. Apple has stopped signing iOS 8.1.2, the last jailbreakable version of the iOS 8 operating system. That means that unless you already have iOS 8.1.2 installed, you won’t be able to jailbreak using existing methods until another exploit comes down the pipeline.
If you’re not familiar with ‘signing’, it’s basically a technique Apple uses to tell iTunes, iPhones, and iPads that a version of iOS is up-to-date. Think of it as something similar to the expiration data on the side of a carton of milk: when Apple stops signing a version of iOS, it’s effectively saying it has expired.
A few weeks ago, Apple released iOS 8.1.3, in which they thanked jailbreakers for helping them patch a hole that made jailbreaking possible. However, iOS 8.1.2 was signed up until yesterday, allowing jailbreaking to continue. But the expiration date has finally come down.
Here’s how the game of iOS cat-and-mouse jailbreak works. A team releases a working jailbreak for the most recent version of iOS to the public. Apple moves to eliminate the exploit that made the last jailbreak possible, releases a new version of iOS, and eventually stops ‘signing’ previous jailbreakable versions of iOS, meaning they can no longer be installed on devices. Rinse and repeat.