Apple Stops Signing iOS 8.4.1 And iOS 9.0, Downgrades No Longer Possible
After releasing a bunch of updates today, namely OS X 10.11 El Capitan, iOS 9.0.2 and iOS 9.1 beta 3 for both developers and public beta testers, Apple has now closed the signing window of iOS 8.4.1 for all iPhone, iPad and iPod touch devices.
Not only has Apple closed the signing window for iOS 8.4.1, but also for iOS 9.0 which was released only about two weeks ago. The signing window for iOS 9.0 though currently appears to be closed only for the latest iPhone 6s and iPhone 6s Plus, but it wouldn’t be too long now before they close it for all other devices as well.
Strangely enough, iOS 9.0.1 is still being signed.
So why is this a big deal? Closing of signing window for iOS 8.4.1 and 9.0 means you can no longer downgrade your iPhone, iPad or iPod touch to the aforementioned firmware versions. For jailbreakers, this is a big deal because apparently there is a jailbreak in the works for iOS 8.4.1 which is rumored to be nearing release. But now that Apple has stopped signing 8.4.1, it means anyone who hasn’t downgraded to 8.4.1 from any version of iOS 9.x can no longer downgrade to 8.4.1 and jailbreak, if or when the jailbreak is made available.