What is the relationship between the apple MAC operating system and linux?

A long time ago, a couple of second-hand goods wrote a thing called UNIX, but it was expensive.

Later, two groups of people thought this was bad, and so Linux and BSD appeared.

Linux itself is not an operating system, just a kernel, and this kernel becomes an operating system after mounting a lot of things, and one of the things mounted is called a shell.

BSD is an operating system in its own right, closer to UNIX.

Later, FreeBSD appeared, which seems to be not much different from BSD and is open source.

The kernels of these operating systems are different, but they all use shells as the command line for communication.

In fact, there are many versions of the shell, and there are some subtle differences in the way commands are written, but they generally look the same.

Later, Apple developed the Mac based on FreeBSD

OS, followed by every new version of Mac

The OS system retains the new features of FreeBSD to a large extent. And of course, shells.

So, these systems all look alike. They're all called Unix

Like (called "unix-like" in Chinese) system.

As follows: Linux itself is not an operating system, just a kernel, and this kernel becomes an operating system after mounting a lot of things, and one of the mounted things is called a shell.

BSD is an operating system in its own right, closer to UNIX.

Later, FreeBSD appeared, which seems to be not much different from BSD and is open source.

The kernels of these operating systems are different, but they all use shells as the command line for communication.

In fact, there are many versions of the shell, and there are some subtle differences in the way commands are written, but they generally look the same.

Later, Apple developed the Mac based on FreeBSD

OS, followed by every new version of Mac

The OS system retains the new features of FreeBSD to a large extent. And of course, shells.

So, these systems all look alike. They're all called Unix

Like (called "unix-like" in Chinese) system.

Windows system Windows system is developed by Microsoft Corporation, from the beginning of the 80s of the last century, to the current Windows 10, after a long period of more than 30 years. Windows computers occupy an absolute mainstream position in personal computers and occupy a global market share.

Mac OS System Mac OS is a high-performance computer operating system developed by Apple Inc., which is loved and sought after by some professionals. Mac OS system has its own unique advantages in graphic design, film and television production and other fields, so we mostly see Mac O...

UNIX system, a paid system, is the oldest computer operating system, born in the 70s of the last century. The security of the UNIX system is the highest among these operating systems. At present, the UNIX system only has a command line interface, not a graphical interface, and is now mostly used on enterprise-level servers, such as:

Banks, telecommunications, etc., many companies' R&D systems also use the UNIX system platform. There are also operating systems that are based on UNIX, such as Apple's Mac OS.

It doesn't matter, it doesn't matter.

Apple computers are independent systems that are not compatible with x86 machines from hardware (CPU instructions) to software, and have nothing to do with Unix and Linux. The Mac operating system had a version in 1984, and Unix was originally started by Bell Experiments, an operating system specially developed for large servers, which began to be developed in 1969, and can be said to have developed in tandem with computers, and by 1976, Unix was basically formed, but that could only be a very small number of people would use those complicated commands. Apple computer was positioned as a family personal computer from the beginning, and the instructions were not compatible, 1984jobs (Jobs) presided over the development of the first version of the Mac, mouse operation, graphical interface, window way to give people a very convenient operation, making people feel that using a computer is as simple as a child building blocks.

macOS can be divided into two families of operating systems: one is the old and no longer supported "classic" macOS (the system was built on the first Mac sold in 1984 and its successors, and the final version was macOS 9). MACH is used as the kernel and was called "before OS8".

The new macOSx combines elements of BSDunix, OpenStep and macOS9. At the bottom of it, it's based on the Unix foundation, which is called Darwin and is partially open source.

Now I understand why I say that Mac and Unix are both connected and not connected. There was no contact before, there is a connection in the latest.