Apple Stops Signing iOS 15.4 Following iOS 15.4.1 Release, Downgrading No Longer Possible
Following the March 31 release of iOS 15.4.1, Apple has stopped signing iOS 15.4, the previously available version of iOS that came out earlier in March. As iOS 15.4 is no longer being signed, it is not possible to downgrade to that version of iOS once you've installed iOS 15.4.1.
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 is no longer being signed.
iOS 15.4 was a major update featuring support for unlocking an iPhone while wearing a mask, new emoji characters, Universal Control on the iPad, and tons more.
iOS 15.4.1 added a fix for a battery drain issue on the iPhone, but more importantly, it addressed AppleAVD issue that could allow an application to execute arbitrary code with kernel privileges. Apple said this exploit may have been actively exploited, so it is a good idea to update to iOS 15.4.1 if you have not done so already.
Apple has also stopped signing tvOS 15.4 and HomePod 15.4 software.
Popular Stories
In a memo shared with Apple Stores and Apple Authorized Service Providers this week, and later obtained by MacRumors, Apple provided technicians with guidance on how to diagnose and address the iPhone Duo's inner display cracking issue.
If a customer reports the issue, Apple advised technicians to inspect the iPhone Duo and repair or replace it in accordance with their standard procedures....
Apple released iOS 27.2 on October 26, bringing enhancements to Siri AI, adding Suggestions in Messages, and sneaking in a string of smaller additions across Photos, Podcasts, Games, Apple TV, and FaceTime.
iOS 27.2 is available to download to your device now via Settings ➝ General ➝ Software Update. Note that some features may not be available in all regions or on all iPhone models....
In the U.S. and most other countries, Apple's website shows the new iPad mini being held by pinched fingers, but this is not the case in South Korea.
The new iPad mini shown with pinched fingers on Apple's website in the U.S.
On its South Korean website, Apple simply shows an image of the iPad mini on its own.
The new iPad mini shown without pinched fingers on Apple's website in South Korea ...
