After releasing iOS 15.2.1 and iPadOS 15.2.1 a few weeks ago, Apple stopped signing the previous version, 15.2. In a move that we have already seen several times, the Cupertino company ensures that if we need to restore any of our devices, we will do so to version 15.2.1, which, among other things, contains several improvements of security.
Security means being up to date with software
Apple regularly stops signing older versions of operating systems so that device upgrades or new installations after a restore install the latest and most secure version. In iOS 15.2.1, in addition to fixing a CarPlay bug, Apple closed a HomeKit bug that could cause the device to become unresponsive.
The change is valuable enough that the company’s servers have stopped signing the older version in favor of the newer one. Without signing older versions, they cannot be installed. An important security mechanism that prevents devices from falling behind in security.
As iOS 15 development continues in the iOS 15.3 beta, Apple continues to update and improve systems, with its sights already on iOS 16. A release that, if all goes as planned , we will see in June of this year and which will mark the start of a new beta cycle until its release in the fall.
As we mentioned earlier, software updates go way beyond new features. They bring much more important novelties which, however, can easily go unnoticed: bug fixes and security improvements.
Picture | Jeremy Bezanger