iOS 27 extends fast capture prioritization on iPhone 16 and 17 to apply deferred processing to balanced-quality captures taken in quick succession, dramatically reducing shot-to-shot delay while still delivering high-quality results. Combined with 24/48MP support on the telephoto and ultrawide cameras, this release brings significant capture pipeline improvements.
• iOS 27 adds deferred processing support for balanced fast captures on iPhone 16/17, reducing sustained shot-to-shot delay far beyond what was possible in iOS 16–26
• Ultrawide camera on iPhone 17 gains 24MP and 48MP capture support (previously telephoto gained this on iPhone 16 Pro)
• The 18MP Center Stage front camera capture tier is new in iOS 27 on iPhone 17
• Starting in iOS 27 on iPhone 16/17, fast capture prioritization now defers processing of balanced captures, minimizing blocking time and allowing sustained rapid-fire high-quality shooting
• The ultrawide camera on iPhone 17 now supports 24MP and 48MP captures, expanding full-resolution shooting to all three lenses
• Developers can pre-allocate resources with setPreparedPhotoSettingsArray to eliminate per-capture allocation delays, keeping the shutter feeling instantaneous
iOS 27 adds sectioned queries, codable model attributes, ResultsObserver for non-SwiftUI change observation, and HistoryObserver for reacting to persistent history changes in SwiftData.
iOS 27 expands the App Intents framework with RelevantEntities for contextual content surfacing, EntityCollection for high-performance batch parameter handling, SyncableEntity for cross-device Siri continuity, native Duration/PersonNameComponents parameter types, and @UnionValue for multi-type parameters — plus extended intent execution time limits.
USDKit is a new first-party Swift framework introduced in iOS/macOS 27 that brings native USD scene creation, composition, modification, and export capabilities to Apple platform apps, with deep RealityKit and Spatial Preview integration.
In-depth guide
iOS 26 → iOS 27 Migration Guide →Xcode 27 introduces an agentic localization workflow that lets you ask a coding agent to translate your entire app directly inside Xcode, leveraging String Catalog context — including where and how strings are used — to produce accurate, consistent translations across all languages.