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1. #ALL MAC OPERATING SYSTEMS MAC OS X#
2. #ALL MAC OPERATING SYSTEMS SOFTWARE#
3. #ALL MAC OPERATING SYSTEMS PC#
4. #ALL MAC OPERATING SYSTEMS WINDOWS#

MacOS 10.15: Catalina (Jazz) - 7 October 2019

#ALL MAC OPERATING SYSTEMS MAC OS X#

Here’s an overview of all versions of macOS and Mac OS X Apple has released along with public and internal code names (if available): We will walk you through three categories of Mac operating systems - macOS, OS X and Mac OS X, from the lastest the the oldest. It's praised for the straightforward graphical interface and high security but criticized for updating problems and hardware limitations. Next, we'll take a closer look at what makes the Mac OS X tick.The Mac operating system is the second most widely-used operating system targeted for Apple's Mac family of personal computers.

A second program called a bootloader loads the Mac OS X, assuming there are no errors reported by the firmware.

#ALL MAC OPERATING SYSTEMS PC#

The PC equivalent to the Mac firmware is called BIOS, which stands for basic input-output systems. Its job is to check the computer's CPU, memory, disk drives and ports for errors. The Mac firmware is the first stored program that executes when you turn on a Mac computer. It's not part of the operating system itself. Firmware is a level of programming that exists directly on top of a hardware layer.

One important part of the Mac computer is the firmware. Assuming the programmer has done a good job at building an application without any serious bugs, it should run just fine on the operating system. Program developers build applications for the API. The OS does this through an application program interface (API). An operating system acts as an application interface to the hardware. Without an OS, a programmer would have to design an application to run on the hardware directly. The OS also allows programs to run on a computer. Ideally, the OS will make sure that your computer's hardware is never overtaxed. That can include processing power, memory allocation and computer storage access, among other things.

As you run applications on your computer, the OS allocates the resources necessary to complete the task.

#ALL MAC OPERATING SYSTEMS SOFTWARE#

It's the job of the OS to monitor what software needs and what the hardware can provide. Operating systems are like the manager for a computer. To do the same with hardware would mean switching out physical chips and circuit boards. Software is more malleable than hardware - you can make changes through software patches and version updates.

#ALL MAC OPERATING SYSTEMS WINDOWS#

That's why operating systems like Mac OS X and Windows are software. But such an operating system would be inflexible. This would require building electrical pathways using millions of logic gates. You could design an operating system by physically programming it into a computer's circuits. Only the hardware's physical properties and our own imaginations can limit what programs can do. The operating system allows complex programs to access the capabilities of the hardware to get results. But personal computers need to be more versatile. Some simple computers have no need of an operating system because they only perform a specific task. We define these rules using things like logic gates, which take input and produce an output in a predictable way. The hardware behaves according to strict rules. It takes input in the form of zeros and ones - bits - and channels them through various circuits and processors. Without it, your computer would just be a paperweight.Īt its heart, a computer is a number-crunching device. The OS acts as a platform for all other applications on your machine. The operating system interacts with a computer's hardware on a basic level, transmitting your commands into language the hardware can interpret. What's the big deal about operating systems in the first place? What do they actually do? An operating system is the level of programming that lets you do things with your computer.