Representative ImageApple has released iOS 26.6 for iPhone users. The latest update brings 77 security patches, bug fixes and a new feature designed to prepare devices for the upgrade to iOS 27 later this year. Alongside addressing security issues, the update also optimises the Spotlight search index to reduce the time required for indexing after users install the next major version of iOS.The official release notes state: “This update includes bug fixes, security updates and optimises the Spotlight index to prepare for iOS 27.” The Spotlight optimisation aims to make the transition to iOS 27 smoother, particularly for features that rely on Spotlight indexing.Apple starts Spotlight optimisation to prepare iPhones for iOS 27According to the release notes, iOS 26.6 begins optimising the Spotlight index before users upgrade to iOS 27.The change follows reports from iOS 27 beta testers, who found that Spotlight indexing could take several days after installing the beta. During that period, some features, including Siri AI's personal context capabilities, did not perform as expected because the indexing process was still underway.By starting the optimisation in iOS 26.6, Apple appears to be reducing the amount of work required after users upgrade to iOS 27 later this year.Apple releases 77 security fixes with iOS 26.6In addition to the Spotlight changes, iOS 26.6 includes several security updates.According to Apple's security releases page, the update contains 77 security patches, including 13 kernel fixes and eight WebKit-related security updates.The release also includes general bug fixes, although Apple has not detailed individual fixes in the release notes.How to install iOS 26.6 on eligible iPhonesUsers can install iOS 26.6 by following these steps:Open SettingsTap GeneralSelect Software UpdateFollow the on-screen instructions to download and install the updateApple has already begun testing iOS 27 ahead of its expected release later this year, and iOS 26.6 is the latest public update, focused on bug fixes, security improvements, and preparing compatible iPhones for the upcoming software upgrade.