MacOS: Difference between revisions

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Revision as of 21:20, 15 August 2015

Apple Mac OS X is the operating system for Apple Macintosh computers, first released to the public on March 24, 2001. It is the successor to Mac OS 9, hence the X signifying both its Unix roots and the major release version number 10. As mentioned by Apple, Wikipedia, and others, it is said as Mac OS 10. It shares none of the "Classic" Mac OS design, and is completely rewritten and uses Next frameworks, a hybrid XNU/Mach kernel, and a BSD subsystem dubbed "Darwin". While underlying components of OS X are free/open source software, the top layers, such as the Aqua UI, are proprietary; Darwin packages can be downloaded and compiled from the Apple Open Source website to make a bootable OS.

Mac OS X has been built for three different architectures and four platforms during its release cycle to date. The first six releases (10.0.0-10.5.8) were designed for the PowerPC architecture, adding 64-bit PowerPC support as an additional platform for the G5 in 10.3 Panther. Intel (x86) support started with 10.4.4 Tiger, and was built as a universal release for both PowerPC/x86 with 10.5 Leopard, which finally dropped all G3 support. Since 10.6, PowerPC support is non-existent/dropped, and Mac OS X is currently designed for Mac computers with Intel 32-bit (x86) and Intel 64-bit (x86_64) architectures. AMD is not currently officially supported. Starting with 10.7 "Lion", Mac OS X is now referred to simply as "OS X".

The "iPhone OS" or iOS, which powers the iPhone, iPod touch, and iPad is a direct descendant of OS X, and shares its design and many internal frameworks. The latest version of OS X is "Yosemite" (10.10), released on October 16, 2014.


Versions

Mac OS X versions

Trade name Version Codename Additional information
Mac OS X Developer Preview
Mac OS X Public Beta Kodiak
Mac OS X Cheetah 10.0 Cheetah
Mac OS X Puma 10.1 Puma
Mac OS X Jaguar 10.2 Jaguar
Mac OS X Panther 10.3 Panther
Mac OS X Tiger 10.4 Tiger
Mac OS X Leopard 10.5 Leopard
Mac OS X Snow Leopard 10.6 Snow leopard
Mac OS X Lion 10.7 Lion
Mac OS X Mountain Lion 10.8 Mountain Lion
Mac OS X Mavericks 10.9 Mavericks
Mac OS X Yosemite 10.10 Yosemite