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The current series of Unix-based graphical operating systems developed and marketed by Apple Inc. designed to run on Apple's Macintosh computers (Macs), having been preinstalled on all Macs since 2002. Within the market of desktop, laptop and home computers, and by web usage, it is the second most widely used desktop OS after Microsoft Windows.

In 2016, with the release of macOS 10.12 Sierra, the name was changed from OS X to macOS. macOS 10.12 Sierra's main features are the introduction of Siri to macOS, Optimized Storage, improvements to included applications, and greater integration with Apple's iPhone and Apple Watch. The Apple File System was announced at the Apple Worldwide Developers Conference in 2016 as a replacement for HFS Plus, a highly-criticized file system. This new file system will be implemented at a later date.

During the keynote at WWDC on June 13, 2016, Apple announced that OS X would be renamed macOS to stylistically match Apple's other operating systems, such as iOS, watchOS, and tvOS.
macOS supports the Polaris Architecture.
by Anonymous.ily April 13, 2017
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Oct 3 Word of the Day
I couldn’t care less (but one must keep up appearances, right?)
Frenemy has a family tragedy. "Thoughts and prayers."
by November 05, 2018
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d best race of all maco's short 4 macedonians which all of rockdale are renound for but dont forget us westies from abbotsbury :P d most attractive race of all.
fuck those maco's from abbotsbury are fukin hot pitchku mater
by bozza November 09, 2004
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When Ken wears his bike shorts it gives him a maco
by Jedibuddha May 27, 2017
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any Macintosh operating system predating Mac OS 10.0 (OS X)
Apple betrayed us by abandoning the Mac OS
by deerdance January 22, 2009
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An operating system created in the 80's. It was the first operatung system to incorperate the GUI.Nowadays only 5% o the worlds computer systems are actually macOS, mostly becauese of the pricing, and the fact that most windows users 'slag' them off refering to all Mac user as a Mac fanboy, even through techally a mac run computer is easier to use and is more helpfull towards the media and arts side. Also it is 'slagged' off for its small amount if video games. However newer mac computer can run an app called bootcamp that runs windowOS and effectivly windows games

So techcally i you buy an intell based mac computer you can use both the easiness of a mac with the gamer side if windows

In my opinion
Mac user, MacOS
by Ajn231077 January 25, 2009
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