iOS 13.5.1

Apple stops signing iOS 13.5.1, halting downgrades from iOS 13.6

Anthony Bouchard ∙ July 22, 2020

Apple stopped signing iOS & iPadOS 13.5.1 Wednesday evening, a move on the company’s part that effectively prevents iPhone and iPad users from downgrading from the newer 13.6 release that was released to the general public exactly one week ago from today.

The company is notorious for preventing firmware downgrades because it doesn’t want users downgrading to versions that are vulnerable to exploits – whether those exploits are being used maliciously or for the sake of jailbreaking. Compelling users to upgrade to newer firmware when restoring also buffs Apple’s new firmware adoption statistics that the company frequently enjoys flaunting at Keynote presentations.

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How to downgrade iOS/iPadOS 14 back to an earlier stable release

Christian Zibreg ∙ Updated June 7, 2023

If after installing the iOS 14 beta on your iPhone or the iPadOS 14 beta on your iPad you've determined you'd rather wait until all of the kinks have been worked out, you can always dial things back a little by downgrading to the most recent stable version of the operating system, which at post time was iOS/iPadOS 13.5.1. Follow this tutorial for quick instructions showing you how to downgrade the OS 14 beta or the iPadOS 14 beta to an earlier stable release.

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Apple blocks downgrades to jailbreakable firmware by unsigning iOS & iPadOS 13.5

Anthony Bouchard ∙ June 8, 2020

Apple this evening stopped signing iOS & iPadOS 13.5, a move on the Cupertino-based company’s behalf that essentially prevents iPhone and iPad users from installing this particular version of its firmware whether downgrading from a newer version of the mobile operating system or upgrading from an earlier version.

The move comes approximately one week after Apple released iOS & iPadOS 13.5.1 to the general public specifically with the intention of patching the 0-day kernel vulnerability that Pwn20wnd implemented into the unc0ver jailbreak to add support for iOS & iPadOS 13.5, the latest version of Apple’s mobile operating system at the time.

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Pwn20wnd offers workaround for software update bug in unc0ver v5.0.0-5.0.1

Anthony Bouchard ∙ June 1, 2020

Apple today released iOS & iPadOS 13.5.1 specifically to patch the new kernel exploit that Pwn20wnd incorporated into the unc0ver v5.0.0+ jailbreak tool to support iOS & iPadOS 13.5, making it now more important than ever to avoid updating your device to the latest available firmware if you care whatsoever about being able to customize your handset in an bevy of different ways that otherwise wouldn’t be possible out of the box.

As pointed out this evening by unc0ver lead developer Pwn20wnd, however, it seems that unc0ver versions 5.0.0 and 5.0.1 exhibit a bug in which the option in the unc0ver app for disabling automatic software updates will behave opposite to how users have it configured:

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