Apple on Wednesday stopped signing iOS 15.5 and iPadOS 15.5, just a week after the company released iOS 15.6 and iPadOS 15.6 to all users. As a result, iPhone, iPad, and iPod touch users can no longer downgrade from iOS 15.6 to iOS 15.5, which may affect users awaiting jailbreak.
iOS 15.5 was released on May 16 with minor improvements to Apple Cache and Apple Podcasts, as well as other bug fixes. iOS 15.6 was made available to the public on July 20 with a new option that lets users pause or rewind a live sports game in the Apple TV app. The update also fixes bugs and security breaches.
These exploits can prompt malicious software to execute arbitrary code in operating systems with kernel privileges. This is the main reason why Apple doesn’t allow users to downgrade their devices, as older versions of iOS are more susceptible to security exploits.
You can read the release note for iOS 15.6 below:
- The TV app adds the option to resume an already running live sports game and pause, rewind or fast-forward.
- Fixes an issue where Settings may continue to display that the device’s storage is available even though it is available.
- Fixes an issue that caused the braille device to slow down or stop responding when navigating text in Mail.
- Fixes an issue in Safari where a tab could revert to the previous page.
Downgrade from iOS 15.6 is no longer possible
Reverting to an older iOS build is often used by people who jailbreak their iPhone and iPad. Earlier this month, the Odyssey team group announced that they are working on the first jailbreak tool for devices running iOS 15. However, given how robust the system security has become, this tool will only work with versions of iOS from iOS 15.0 onwards. 15.1.1.
The developers behind the jailbreak tool have said they are working to expand support for versions up to iOS 15.4. Of course, if you’ve updated your device to iOS 15.6, there’s no way to go back to those versions.
Restoring an Apple device to a previous version of iOS can sometimes also be helpful for users who experience critical bugs after upgrading to the latest version of iOS.
Unfortunately, if you’ve experienced any issues with iOS 15.6, you’ll now have to wait until a future update instead of upgrading to iOS 15.5. Right now, Apple is working on iOS 16 beta, which is expected to be available to the public this fall.
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