<P> At macOS 's core is a POSIX compliant operating system built on top of the XNU kernel , with standard Unix facilities available from the command line interface . Apple has released this family of software as a free and open source operating system named Darwin . On top of Darwin , Apple layered a number of components , including the Aqua interface and the Finder , to complete the GUI - based operating system which is macOS . </P>
<P> At macOS 's core is a POSIX compliant operating system built on top of the XNU kernel , with standard Unix facilities available from the command line interface . Apple has released this family of software as a free and open source operating system named Darwin . On top of Darwin , Apple layered a number of components , including the Aqua interface and the Finder , to complete the GUI - based operating system which is macOS . </P>
the most recent version of mac os is based on the ... operating system
the most recent version of mac os is based on the ... operating system
Unix
Unix