Apple Stops Signing iOS 15.4.1 Following iOS 15.5 Release, Downgrading No Longer Possible

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Following the May 16 launch of iOS 15.5, Apple has stopped signing iOS 15.4.1, the previously available version of iOS that came out in late March. Because iOS 15.4.1 is no longer being signed, it is not possible to downgrade to that version of iOS after installing iOS 15.5.

iOS 15
Apple routinely stops signing older versions of software updates after new releases come out in order to encourage customers to keep their operating systems up to date, so it is not unusual that iOS 15.4.1 is no longer being signed.

iOS 15.4.1 was a minor update that addressed an issue that could cause the iPhone's battery to drain more quickly following the iOS 15.4 launch. It also addressed an AppleAVD issue that could allow an application to execute arbitrary code with kernel privileges, which Apple said was actively exploited.

iOS 15.5 added an Apple Cash feature for requesting and sending money, along with new features for Podcasts and a fix for an issue with home automations. It also included several security updates, and those who have not already upgraded to iOS 15.5 should do so for that reason.

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Top Rated Comments

jav6454 Avatar
jav6454
46 months ago

15.5 seems to have been pretty good so far. They finally fix the gapless songs issue in 15.4. And so far, app load times seem a bit better now than 15.4/15.4.1, at least on my iPhone 7+. Feels like 15.5 is finally what 15GM should've been, and Apple finally fixed a lot of bugs.
Right now, we need Apple to place a pause to features in iPhoneOS 16. We need something like Snow Leopard was to OS X and trim down excess code, make it more efficient. Snow Leopard in that regard was highly effective and laid down the foundations for today's high efficiencies.
Score: 5 Votes (Like | Disagree)
emcampbe Avatar
emcampbe
46 months ago

Forcing pepole to upgrade to latest version and disallowing to downgrade if things get wrong is the thing EU should get into.
Forcing to upgrade?

How did they force you to upgrade? Turn off auto-updates and it won’t do that (hey, I’ve got it turned on and even so, I haven’t been prompted for 15.5).

Sure, eventually those older systems are incompatible, but they’re not forcing anyone to upgrade that I’m aware of.
Score: 4 Votes (Like | Disagree)
ian87w Avatar
ian87w
46 months ago
15.5 seems to have been pretty good so far. They finally fix the gapless songs issue in 15.4. And so far, app load times seem a bit better now than 15.4/15.4.1, at least on my iPhone 7+. Feels like 15.5 is finally what 15GM should've been, and Apple finally fixed a lot of bugs.
Score: 4 Votes (Like | Disagree)
now i see it Avatar
now i see it
46 months ago
Still on 14.8.1. Waiting for iOS 15 to be FINISHED
Score: 4 Votes (Like | Disagree)
ouruniverse06131986 Avatar
ouruniverse06131986
46 months ago

Still on 14.8.1. Waiting for iOS 15 to be FINISHED
Oh you mean iOS 16.
Score: 4 Votes (Like | Disagree)
duck apple Avatar
duck apple
46 months ago
Forcing pepole to upgrade to latest version and disallowing to downgrade if things get wrong is the thing EU should get into.
Score: 3 Votes (Like | Disagree)
Read All Comments