Open Source C System Software for Mac

Breakpad is an open source crash reporting system developed by Google that provides both client and server components to capture, analyze, and report software crashes across platforms. It is designed to help developers diagnose and fix crashes efficiently by generating detailed crash dumps, stack traces, and diagnostic data whenever an application fails unexpectedly. The framework includes libraries for embedding crash-handling functionality directly into applications and tools for processing and symbolizing crash dumps on the server side. Breakpad supports multiple operating systems, including Linux, macOS, and Windows, and integrates easily into existing build systems. Its flexible architecture enables developers to automate crash collection and reporting pipelines, making it a popular choice for large-scale software projects and products.

The Darwin Source repository is intended to fill a void left by the closure of the OpenDarwin project: providing a permanent and public repository for the open source components of Mac OS X.

DS Password Tools are a pair of command line tools for changing passwords on Mac OS X and Mac OS X Server (versions 10.2.x) that make use of the Directory Services API. Unlike the included passwd program, these tools are compatible with Password Server.

DVD/CD UDF disc drive tools, esp. for the Iomega RRD (aka Iomega REV) drive. Usability patches for UDF mkfs and fsck. Commentary for the lk MMC and UDF source code. cvs co tarballs for firewalls that defeat CVS. Links, FAQ's, troubleshooting hints.

The Extensible Versioning File System, designed for Windows, Mac OS X, and Linux, introduces native versioning file system functionality to your operating system.

Web application for changing passwords on an Apple OS X Server (10.3+) via the web.

Help port the tulip driver from free/net/openbsd to Darwin OS. So far the driver is written to the ADMtek 985 clone chipset and the PNIC 82c169 chipset. Due to IOKit's object-oriented design, the code can be easily subclassed to support new chipsets.

Darwin XNU is the hybrid kernel that powers Apple’s macOS, iOS, watchOS, and tvOS operating systems, forming the foundation of the Darwin open-source core. The name XNU stands for X is Not Unix, highlighting its origin as a combination of multiple kernel technologies—primarily the Mach microkernel from Carnegie Mellon University, integrated with substantial components from FreeBSD and Apple’s proprietary IOKit driver framework. This hybrid architecture merges the microkernel model’s message-passing flexibility with the monolithic performance and direct hardware control typical of Unix-like systems. XNU handles essential kernel responsibilities such as memory management, multitasking, interprocess communication (IPC), device I/O, system calls, security enforcement, and scheduling across both single and multi-core architectures.