Apple has always common a heart of macOS after any vital release. This heart also runs on iOS inclination as both macOS and iOS are built on a same foundation. This year, Apple also common a many new chronicle of a heart on GitHub. And we can also find ARM versions of a heart for a initial time.
But first, it’s time for some mechanism history. The initial chronicle of macOS (originally named Mac OS X) came out in 2001. It was built on tip of NeXTSTEP, an handling complement grown by NeXT. Steve Jobs founded NeXT in 1985 and sole a association behind to Apple in 1997. And Apple motionless to use NeXTSTEP as a substructure for Mac OS X.
NeXTSTEP itself is subsequent from open-source plan BSD. That’s because a Mac we competence be now regulating relies heavily on open-source technologies. And that’s also because Apple releases a tiny, little apportionment of macOS each year. You can’t accumulate it and run your possess chronicle of macOS, though other heart developers substantially caring about a source formula of this kernel.
What about iOS? When Steve Jobs first introduced a iPhone in 2007, he pronounced that a handling complement of a iPhone is a macOS fork. “Today, we’re going to uncover we a program breakthrough. Software that is during slightest 5 years forward on what’s on any other phone. Now how did we do this? Well, we started with a clever substructure — iPhone runs OS X,” Jobs said. “Why would we wish such a worldly handling complement on a mobile device? Because it’s got all we need.”
Apple after called this handling complement iPhone OS, and afterwards iOS. It’s not an accurate duplicate as there are no floating windows on iOS. But iOS and macOS use a same Unix-based core named Darwin as good as many frameworks. The Apple Watch and a Apple TV also run variants of iOS that also rest on Darwin.
So a fact that we can now download ARM-optimized source formula of Apple’s heart doesn’t meant much. Maybe Apple wants to share a heart of a iPhone to get feedback from a open-source community. Maybe it means that Apple is operative on a chronicle of macOS that runs on ARM chips. Maybe it was an accident. Maybe Apple only wanted to see a greeting on Twitter.