Mac OS X Lion was released on July 20, 2011. It brought developments made in Apple's iOS, such as an easily navigable display of installed applications (Launchpad) and (a greater use of) multi-touch gestures, to the Mac. This release removed Rosetta, making it incapable of running PowerPC applications. Get the Most Out of Your Mac. With coverage of the iMac, MacBook, MacBook Air, and Mac mini, How to Do Everything Mac, OS X Lion Edition shows you how to configure and customize your Mac and take full advantage of all the powerful tools and capabilities. You'll learn about the new features, including Multi-Touch gestures, Mission Control, full. The Mac OS is a graphical operating system developed by Apple Inc. The tenth version of the Mac OS is the Mac OS X which was launched in 2001. The structure of the Mac OS X includes multiple layers. The base layer is Darwin which is the Unix core of the system. These are the top 3 most popular Operating Systems in the world. Mac Os – Mac Os is the operating system by Apple for their exclusive iMac and MacBook lineup. It’s a very sophisticated operating system with superior performance and stability. Windows – Windows is the most popular and widely used operating system on the planet. Mac’s version is a bit more systemwide, with some older Windows dialogs still not darkened. The Windows 10 May 2019 Update adds a Custom option, which lets you decide whether you want dark.
Keychain Access User Guide
Keychain Access is a macOS app that stores your passwords and account information and reduces the number of passwords you have to remember and manage.
When you access a website, email account, network server, or other password-protected item, you may be given the option to remember or save the password. If you choose to save the password, it’s saved in your keychain so you don’t have to remember or type your password every time.
Because Keychain Access securely stores and retrieves your user names, passwords, and other information, you can make individual passwords more complex and difficult to break. This can make your individual accounts more secure.
Important: To ensure that passwords and other data stored in your keychain are secure, make sure to set up a login password for your computer. See Change the login password.
You can store any type of sensitive information in Secure Notes.
You can also use Keychain Access to manage certificates, which are issued by trusted organizations to validate websites, digital documents, and other web-based materials.
Keychain Access works in collaboration with iCloud Keychain, which lets you share keychains with your other devices. To create and manage your iCloud Keychain, sign in to iCloud with your Apple ID. See the Apple Support article Set up iCloud Keychain.
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The Mac OS is a graphical operating system developed by Apple Inc. The tenth version of the Mac OS is the Mac OS X which was launched in 2001.
The structure of the Mac OS X includes multiple layers. The base layer is Darwin which is the Unix core of the system. Next layer is the graphics system which contains Quartz, OpenGL and QuickTime. Then is the application layer which has four components, namely Classic, Carbon, Cocoa and Java. The top layer is Aqua, which is the user interface.
A diagram that demonstrates the structure of Mac OS X is as follows −
Components of the Mac OS X Structure
Details about the different components of the Mac OS X structure as seen in the image above are as follows −
Core OS
The Darwin Core is based on the BSD (Berkeley Software Distribution) version of Unix. Mach is the main part of the Darwin core and it performs operations such as memory use, data flow from and to CPU etc. Darwin is also open source i.e. anyone can obtain its source code and make modifications to it. Different versions of Darwin can be used to enhance the Mac OS X.
Some of the major features of the Darwin core are protected memory, automatic memory management, preemptive multitasking, advanced virtual memory etc. It also provides I/O services for Mac OS X and supports plug-and-play, hot-swapping and power management.
Graphics Subsystem
The graphics subsystem in the Mac OS X contains three parts i.e. Quartz, OpenGL and QuickTime. The 2-D graphics in the graphics subsystem is managed by Quartz. It provides fonts, interface graphics, rendering of the images etc. OpenGL provides support for 3-D graphics in the system such as texture mapping, transparency, antialiasing, atmospheric effects, special effects etc.
It is also used in Unix and Windows systems. QuickTime is used for different digital media such as digital video, audio and video streaming etc. It also enables creative applications such as iMovie, iTunes etc.
Application Subsystem
The application subsystem in Mac OS X provides the classic environment to run classic applications. Carbon, Cocoa and Java are the three application development environments available.
The classic environment makes sure that applications written for the previous versions of the operating system can run smoothly. The carbon environment is used to port existing applications to carbon application program interfaces. This is called carbonising the application. The cocoa environment provides object-oriented application development environment. The cocoa applications use the benefits of the Mac OS X Structure the most. The Java applications and Java applets can be run using the Java environment.
User Interface
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Aqua is the user interface of Mac OS X. It provides good visual features as well as the tools to customize the user interface as per the user requirements. Aqua contains extensive use of colour and texture as well as extremely detailed icons. It is both pleasant to view and efficient to use.