After iOS 15.5 was released on May 16, Apple stopped signing iOS 15.4.1. This is a version of iOS that was previously available before it was released in late March. iOS 15.4.1 is unsigned, so you cannot downgrade to that version of iOS after installing iOS 15.5.


To encourage customers to keep their operating systems up-to-date, Apple will periodically stop signing older versions of software updates after new releases are released. As a result, it’s not uncommon for iOS 15.4.1 to be unsigned.

iOS 15.4.1 is a minor update that addresses an issue that could cause the iPhone battery to drain faster after the release of iOS 15.4. We’ve also addressed an issue with Apple AVD that could allow an application to execute arbitrary code with kernel privileges that Apple said was actively abused.

iOS 15.5 adds Apple Cash functionality for requesting and sending money transfers, as well as new podcast features and fixes for home automation issues. It also includes some security updates, and if you haven’t upgraded to iOS 15.5 yet, you’ll need to upgrade for it.

Related article

Apple has stopped signing iOS 15.4 following the iOS 15.4.1 release, making downgrades impossible

Following the March 31st release of iOS 15.4.1, Apple has stopped signing iOS 15.4. This is a version of iOS that was previously available before it was released in early March. iOS 15.4 is unsigned, so once you install iOS 15.4.1, you will not be able to downgrade to that version of iOS. After a new release is released, Apple will periodically stop signing older versions of software updates for the following purposes …

Apple has stopped signing iOS 15.3.1 following the iOS 15.4 release, making downgrades impossible

After iOS 15.4 was released on March 14, Apple stopped signing iOS 15.3.1, the previously available version of iOS that was released in February. iOS 15.3.1 is unsigned, so if you update to iOS 15.4, you will not be able to downgrade to that version of iOS. To encourage you, Apple will stop signing older versions of software updates on a regular basis after new releases are released …

Apple has stopped signing iOS 15.3 following the iOS 15.3.1 release, making downgrades impossible

After iOS 15.3.1 was released on February 10, Apple stopped signing iOS 15.3. This is the previously available version of iOS released in late January. iOS 15.3 is unsigned, so if you update to iOS 15.3.1, you will not be able to downgrade to that version of iOS. After new releases are released in sequence, Apple will periodically stop signing older versions of software updates …

Apple has stopped signing iOS 15.2 following the iOS 15.2.1 release, making downgrades impossible

Following the release of iOS 15.2.1 in early January, Apple has stopped signing iOS 15.2. This is the version of iOS that was available before it was released publicly on December 13. iOS 15.2 is no longer signed and cannot be downgraded to it. If you have already updated to iOS 15.2.1, the version. After a new release is released, Apple will periodically stop signing older versions of software updates …

Apple has stopped signing iOS 15.0 following the release of iOS 15.0.1, making downgrades impossible

After iOS 15.0.1 was released on October 1, Apple stopped signing iOS 15.0. This is a previously available version of iOS, released on September 20th. iOS 15.0 is no longer signed and cannot be downgraded to it. If you have already updated to iOS 15.0.1, the version. Apple also stopped signing iOS 14.8 last week. So iOS 15.0.1 is the only public place …

Apple will stop signing iOS 14.7 following the iOS 14.7.1 release

Following the release of iOS 14.7.1 last week, Apple has stopped signing iOS 14.7. This is a version of iOS that was previously available before it was released in early July. You cannot downgrade to iOS 14.7 if you already have iOS 14.7.1 installed because iOS 14.7 is not signed. Apple will regularly stop signing older versions of software updates to encourage new releases …

Apple will stop signing iOS 14.6 following the iOS 14.7 release

Following the release of iOS 14.7 last week, Apple has stopped signing iOS 14.6, a previously available version of iOS released in May. If you already have iOS 14.7 or iOS 14.7.1 installed, you will not be able to downgrade to iOS 14.6 because iOS 14.6 is no longer signed. After a new release is released, Apple will periodically stop signing older versions of software updates for the following purposes …

Apple pushes iOS 14 users to upgrade to iOS 15 more aggressively

Apple is encouraging people who are still running iOS 14 to update to iOS 15. This is a reversal of the previous policy that the company allowed iOS 14 users to choose not to install the iOS 15 update. When iOS 15 was released, Apple said it promised to offer a “choice from two software update versions” and provide security updates to those who chose to stick to iOS 14. ..

Popular story

Will iPhone 14 be disappointed?

It will take about four months for Apple to announce the iPhone 14 lineup, but so far the overwhelming majority of rumors related to new devices have focused on the iPhone 14 Pro instead of the standard iPhone 14, which Questions have arisen about the difference. The iPhone 14 is actually that of its predecessor, the iPhone 13. iPhone 14 Pro and iPhone 14 Pro Max are expected …

Sony’s new WH-1000XM5 headphones and Apple’s AirPods Max

This week, Sony announced an updated version of its popular over-ear noise canceling headphones, so which headphones are better than AirPods Max and whether it’s worth buying the $ 400 WH-1000XM5 from Sony. I checked. It’s over Apple’s $ 549 AirPods Max. For more videos, subscribe to the MacRumors YouTube channel. First of all, AirPods Max wins when it comes …

Apple raises Apple Music subscription prices for students in several countries

Apple has silently raised prices for Apple Music subscriptions for college students in several countries, and the company has sent students an email notifying them that subscription prices will rise slightly in the future. Price changes are not widespread and will affect, but are not limited to, Apple Music student subscribers in Australia, based on MacRumors survey results …

“High-end” iPhone 14 front camera triples Apple’s cost

According to ET News reports, the iPhone 14 will feature a more expensive “high-end” front-facing camera with autofocus, some of which will be manufactured for the first time in South Korea. Apple reportedly banished the Chinese candidate, chose the South Korean company LG Innotek, and supplied the front camera of the iPhone 14 alongside Sharp in Japan. The company is said to have initially planned to switch the iPhone to LG …