Although it may seem strange, Apple s MacOS is at heart an open-source system.
Apple is one of the most profitable companies in the world and yet the core components of the operating system driving its Mac line is made up of freely available software.
Called Darwin, these open-source components include major parts of the MacOS kernel, portions of Linux BSD, and various drivers.
As such, Apple has always made these open-source software bits available for download ever since OS X 10.0 was released, and now the company has made MacOS 10.12 Sierra s Darwin available as well, according to 9to5Mac.
More: Microsoft open sources PowerShell, makes it available on Linux and MacOS
Darwin isn t the only Apple software that the company open-sources.