The term signifies the extent to which specific Apple devices are able to function correctly with the iOS 18 operating system. It dictates whether an iPhone or iPad model can install and run the software, including accessing its features and security updates. For instance, a newer iPhone model might be fully compatible, allowing seamless operation, while an older device may be incompatible due to hardware limitations, preventing the installation altogether.
Determining whether a device can operate with a particular operating system is crucial for several reasons. Device compatibility ensures users receive essential security patches, safeguarding against potential vulnerabilities. Furthermore, it allows access to the latest software features and improvements, enhancing the user experience. Historically, Apple has phased out support for older devices to maintain performance and security standards, which necessitates hardware capable of supporting new software functionalities.