
– iOS 11 to 11.2.6
– macOS 10.13 to 10.13.3
– watchOS 4 to 4.2.3
– tvOS 11to 11.2.6
Affected users will likely receive a notification from Apple to get them to update to a new operating system version, if possible.

Some older software versions will no longer support Apple Services like the App Store, Siri, and Maps. Update your software to the latest available version to continue using these services”.
The move will likely impact only a small number of Apple users as the affected devices were released a long time ago. For perspective, Apple said in February that only 8 percent of the active iPhones were running iOS 14 or older.
Still, it will be a shocker. Apple has never done anything like this before and it would be a huge inconvenience for Apple users who don’t have the means or the will to get a new device.