They all run the same kernel and runtimes, but some diversified distributions have extra runtimes and frameworks for their task-specific implementations.
- Cocoa
- Objective-C
- XNU
It used to be all based on pure Darwin (also from Apple, but OSS). But since the iOS releases it has been diversified too much and Apple no longer wanted to backport to their own OSS (but they still backport to all GPLv2 and lower).
- Cocoa
- Objective-C
- XNU
It used to be all based on pure Darwin (also from Apple, but OSS). But since the iOS releases it has been diversified too much and Apple no longer wanted to backport to their own OSS (but they still backport to all GPLv2 and lower).