Overview

• Apple says post‑update battery drain, sluggishness and higher temperatures can be temporary as iPhones finish background indexing and optimization after a major release.
• Security experts, including Jamf’s Adam Boynton, urge prompt updating to iOS 26 for patches across components such as the Apple Neural Engine and WebKit.
• For those delaying the redesign, Apple has released iOS 18.7 as a smaller security update, with both versions expected to be available in parallel for a limited window.
• Reports detail lag, app freezes and overheating plus mixed reactions to the Liquid Glass look, with suggested mitigations such as waiting 24–48 hours, restarting, freeing storage, reducing animations and updating apps.
• iOS 26 supports iPhone 11 and newer models including recent SE devices, leaving older phones like the iPhone XS and XR on iOS 18 series security updates.