visionOS26Beta4toBeta5.md

visionOS 26 Beta 4 to Beta 5 Changelog

New Features Added in Beta 5

Foundation Models Framework

• Enhanced Refusal Handling - Framework now supports programmatically detecting when and why the model refuses to respond with LanguageModelSession.GenerationError.refusal and model-generated explanations (156086748)
• Content Completion Detection - New isComplete property in GeneratedContent to check if content was fully generated (156109416)
• Raw Content Access - Access underlying weakly typed GeneratedContent via rawContent property on Response or ResponseStream (156351123)
• Permissive Content Transformations - New Guardrails.permissiveContentTransformations mode for text-to-text tasks like summarization and rewrite (156721060)

Game Controller

• Multi-Device Pairing - Pair multiple Apple devices to DualSense or DualSense Edge controllers and switch between them directly (137782227)

Issues Resolved (Moved from Known Issues to Resolved Issues)

Spatial Video

• Fixed: Immersive button missing on spatial video player in visionOS simulator (154772614)

UI Frameworks

• Fixed: Gaze hover effects not appearing on controls when occluded by another object (149493534)

New Known Issues Added in Beta 5

ARKit

• Anchor removal notifications not surfacing for AccessoryTrackingProviders when spatial accessories disconnect (155822320)

CompositorServices

• Metal 4 with progressive immersion crashes when calling cp_drawable_render_context_mtl4_end_encoding (156963664)

CoreData (New Section)

• SDK changes to Sendable annotations for Swift 6 compatibility may introduce new warnings for concurrency violations (153848710)

Foundation Models Framework

• Model requests may erroneously throw guardrailViolation when model assets aren't fully downloaded (156223847)
• Tools with enum arguments containing associated types encounter ToolCallError with decodingFailure (156723065)

Safari

• Scroll indicator knob becomes invisible after use (154223351)

Search (New Section)

• Some applications may quit unexpectedly when using search (157464670)

Spotlight (New Section)

• Blank icons shown for native visionOS apps in Siri Suggestions (155998187)

SwiftUI

• DragGesture has unitless default minimumDistance of 10 (144949485)

Additional Resolved Issues in Beta 5

ARKit

• Fixed: Memory retention issue in ar_accessory_tracking_provider_get_latest_anchors documentation (154337356)
• Fixed: Accessory tracking failures and controller recognition issues from Beta 4 (156458710)

Background Assets

• Fixed: URL Override setting not saving port numbers, defaulting to port 443 (156113742)

Foundation Models Framework

• Fixed: Guided generation and tool calling decoding failures (153773704)
• Fixed: Tools not being called with guided generation (155313086)
• Fixed: Enum with associated values causing SchemaError crashes (155957346)

RemoteImmersiveSpace

• Fixed: App session ending due to Wi-Fi issues or Mac freezing (149237275)
• Fixed: Blank UI window when using Mac Virtual Display (151899171)

SwiftUI

• Fixed: Environment updates not propagating into popover content views (147954025)
• Fixed: Gesture priority issues with UIGestureRecognizers and NSGestureRecognizers (155581361)

TextKit

• Fixed: Inconsistent NSParagraphStyle indentation property directionality (155893102)

New Deprecations in Beta 5

CoreData

• Removed support for deprecated NSPersistentStore option keys (over a decade old):
  • NSPersistentStoreUbiquitousContentNameKey
  • NSPersistentStoreUbiquitousContentURLKey
  • NSPersistentStoreUbiquitousPeerTokenOption
  • NSPersistentStoreRemoveUbiquitousMetadataOption
  • NSPersistentStoreUbiquitousContainerIdentifierKey
  • NSPersistentStoreRebuildFromUbiquitousContentOption
• Apps built with iOS/macOS 26 SDK will get errors; older SDK apps will log warnings (157297746)

Version Compatibility Changes

RemoteImmersiveSpace

• Added backwards compatibility restriction: visionOS 26 beta 5 not compatible with macOS 26 beta 4, and vice versa (153037593)

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Summary: Beta 5 significantly enhances the Foundation Models framework with improved error handling, content completion detection, and more permissive content transformation modes. The release includes important CoreData concurrency improvements for Swift 6 compatibility, though this introduces breaking changes for deprecated iCloud sync options. Game Controller support expands with multi-device pairing capabilities. Several critical issues from Beta 4 were resolved, particularly around ARKit accessory tracking and Foundation Models tool calling, while new issues emerged primarily around UI components and search functionality.