Apple iOS 27 Architecture, Rollout Schedule & Supported Hardware

### Operating System Kernel & Memory Constraints Apple iOS 27 introduces a major memory architecture update for Apple Silicon: 1. **Unified Memory Floor for Neural Inference**: On-device foundation models running under Apple Intelligence 2.0 require a minimum of 8 GB unified memory. Devices with 6 GB or 4 GB LPDDR4X/LPDDR5 (iPhone 13, 14, and base 15 models) execute the Darwin kernel and standard UIKit/SwiftUI interfaces, but fall back to Private Cloud Compute for contextual intelligence operations. 2. **UIFoldableLayoutGuide & Asymmetric Dual-Screen Staging**: To support the iPhone Duo foldable hardware, iOS 27 provides real-time hinge state dispatchers (`HingeSensorKit`). The window server dynamically manages split-screen bounds without triggering full view controller teardowns. 3. **Global CDN Release Mechanics**: Apple stages downloads across Akamai, Cloudflare, and internal CDN nodes beginning at 10:00 AM PDT on September 14, 2026. OTA delta packages range from 6.2 GB to 7.8 GB, requiring 14 GB of scratch disk space for payload verification.