apple-oss-distributions/xnu

Health v2 · maintenance only

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Adoption not part of the score

3539 stars · 404 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

The XNU kernel source code, the core of Apple's Darwin operating system used in macOS and iOS. It is a hybrid kernel combining the Mach microkernel, FreeBSD components, and the C++-based IOKit driver framework.

Use cases

• study how the macOS and iOS kernel works
• build a custom Darwin kernel for research
• debug kernel panics with full source and symbols
• develop or audit kernel extensions and drivers
• research XNU security internals like MAC policies
• port or experiment with Darwin on ARM64 or x86_64

When to choose

• you need the authoritative source for the Apple/Darwin kernel
• you are doing kernel-level security research or reverse engineering on macOS/iOS
• you want to build debug, development, or release kernel variants with Apple's make system

When to avoid

• you want to run a general-purpose Unix-like OS on commodity hardware - use Linux or a BSD instead
• you need to modify and boot a kernel on production Apple devices, which is largely impractical
• you are looking for a driver framework for third-party hardware rather than kernel source study

Facets

library · maturity active

security operating-systems apple-ecosystem security developer-tools c xnu-kernel darwin mach bsd iokit apple-open-source hybrid-kernel kernel-source operating-systems kernel driver-development macos ios x86_64 arm64

Member repositories

For agents

markdown · JSON · MCP: product_card(name="apple-oss-distributions/xnu")