Operating systems › Apple macOS › macOS 26
macOS 26
2025
macOS Tahoe, the September 2025 release introducing the translucent Liquid Glass interface and year-based version numbering.
Reference & documentation
External technical references for programming macOS 26 and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| Apple File System (APFS) Reference ↗ | Format | APFS on-disk data structures for independent implementers |
| OS X ABI Mach-O File Format Reference ↗ | Format | Canonical Mach-O executable/object format spec |
| Apple Silicon CPU Optimization Guide ↗ | Instruction set | ISA, SIMD, SME, latency and microarchitecture tables |
| macOS ARM64 System Call Table ↗ | Interrupt list | svc syscall numbers in x16 for arm64 |
| Writing ARM64 Code for Apple Platforms ↗ | Programming | Apple's ARM64 ABI: register usage, calling conventions |
| HelloSilicon: ARM64 Assembly on Apple Silicon ↗ | Programming | Hands-on Darwin arm64 assembly tutorial, 16 chapters |
| Asahi Linux: Introduction to Apple Silicon ↗ | Reference | Reverse-engineered SoC boot, firmware, hardware internals |
| macOS Tahoe 26 Release Notes ↗ | Reference | Official API changes and deprecations for macOS 26 |
| XNU Kernel Source (apple-oss-distributions/xnu) ↗ | Source | Official Darwin/macOS kernel: Mach + BSD + IOKit |