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en.wikipedia.org/wiki/Macintosh_operating_systems

The family of Macintosh operating systems developed by Apple Inc. includes the graphical user interface-based operating systems it has designed for use with ...

en.wikipedia.org/wiki/MacOS

macOS is the current series of Unix-based graphical operating systems developed and marketed by Apple Inc. designed to run on Apple's Macintosh computers ...

www.apple.com/macos/sierra

Siri makes its debut on Mac, with new capabilities designed just for the desktop. ... The handy features of Siri on iOS are now on your Mac, along with .... System ...

www.apple.com/macos/how-to-upgrade

Before you upgrade, we recommend that you back up your Mac. You should also have your Apple ID and password handy. Then, if your Mac is running OS X ...

support.apple.com/en-us/HT201260

May 15, 2017 ... Check About This Mac to find the version number and build number of your Mac operating system. Knowing the macOS version number can ...

whatis.techtarget.com/definition/Mac-OS

Mac OS is the computer operating system for Apple Computer's Macintosh line of personal computers and workstations.

www.operating-system.org/betriebssystem/_english/bs-macos.htm

Mar 27, 2017 ... Mac OS Logo Mac OS was named by the company Apple as "Mac System Software" in the beginning, a specially designed operating system ...

www.computerhope.com/jargon/m/macos.htm

Apr 26, 2017 ... The macOS or macOS is an operating system that was designed for the Apple Macintosh computer. It was developed by Apple Inc., who also ...

www.britannica.com/technology/Mac-OS

May 9, 2017 ... Mac OS, operating system (OS) developed by the American computer company Apple Inc. The OS was introduced in 1984 to run the company's ...