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Apple opens the gates: Darwin source code available to developers!
Apple releases Darwin substructure source code with updates for macOS Sequoia 15.5; important changes and new features.
Apple opens the gates: Darwin source code available to developers!
Apple released the updated source code of the Darwin substructure for developers and interested users on May 22, 2025. This happened just a week and a half after the release of macOS Sequoia 15.5, an update that fixes numerous bugs and security vulnerabilities as well as removing AFP support, as macgadget.de reported. The Darwin part of the Mac operating system consists partly of open source components, giving developers the opportunity to actively participate in development.
The release includes source code for central components such as the kernel (XNU), drivers and the CUPS printing system as well as the WebKit rendering engine. Many open source packages, including Apache, Bash, OpenLDAP, OpenSSH, OpenSSL, Perl, Python, Ruby and Zsh, are also accessible through Apple's open source website. Apple's goal with this transparency is to encourage developers in the open source community to collaborate and provide feedback.
New features in macOS Sequoia 15.5
The update to macOS Sequoia 15.5 not only brings security updates, but also numerous new functions. According to support.apple.com, this version is recommended for all users as it contains important bug fixes and security updates. New features include the ability to create movies from photos using Apple Intelligence Memory and a new sketch style option in the Image Playground.
There are also improvements to the Mail application with a new categorization feature and expanded organizing and filtering options in the Photo Library. Apple has also added other features such as Smart Reply in Mail and Messages as well as dynamic subtitles and hands-free Siri interactions.
Future developments and macOS 16
Apple is already planning the next version of its operating system: macOS 16 is expected to be presented at the WWDC25 developer conference next month. This release may focus exclusively on Apple Silicon Macs. According to current information, version 15.6 is expected in July 2025 and version 15.7 in September, parallel to the release of macOS 16.0.
Overall, the continued updating of source code and the release of new features shows that Apple continues its commitment to the developer community and the security of its users. The integration of new tools and features reflects Apple's commitment to improving usability and creativity on its platforms.