Cctools 6.5 !new! Jun 2026

For the first time in a minor release, the team prioritized non-Darwin builds. The autotools and CMake recipes for Cctools 6.5 now reliably produce working ld and as equivalents on Ubuntu 22.04+, enabling true macOS-on-Linux cross-compilation without hacking header files.

With Apple’s transition from Intel x86_64 to Apple Silicon (arm64), Cctools 6.5 implements full support for creating, inspecting, and modifying arm64 binaries. The lipo tool now correctly handles thin and fat binaries containing arm64 slices alongside x86_64. Cctools 6.5

: A virtual file system that enables standard programs to access remote storage systems (like HDFS, FTP, and Chirp) without requiring administrative privileges or code modifications. For the first time in a minor release,

Or build from source:

Installation is straightforward on Linux and macOS (experimental Windows support via WSL2). Below are the most common methods. The lipo tool now correctly handles thin and

Example use case: A developer debugging a crash in a mixed Swift/Obj-C framework can now run: