Mac OS x 10.10-Yosemite

Mac OS- Versions

Mac OS x v.10.10

History:

OS X Yosemite (version 10.10) is the eleventh major release of OS X (now named macOS), Apple Inc.'s desktop and server operating system for Macintosh computers.

OS X Yosemite was announced and released to developers on June 2, 2014 at WWDC 2014 and released to public beta testers on July 24, 2014. Yosemite was released to consumers on October 16, 2014^. Following the California landmark-based naming scheme introduced with OS X Mavericks, Yosemite is named after the national park.

Features:
Here are some features that differ from previous releases of OS X:

Improved multiple display support: The menu bar and the Dock are available on each display; Apple TV can be used as an external display.
Mission Control has been updated to organize and switch between Desktop workspaces independently between multiple displays.
Finder enhancements, including tabs, fullscreen support, and document tags.Pinch-to-zoom and swipe-to-navigate-history gestures have been removed, although both are supported anywhere else.
New iBooks .
New Maps application.
Calendar enhancements.
Safari browser enhancements.
iCloud Keychain sync.
Notification Center enhancements
Some skeuomorphs, such as the leather texture in Calendar, the legal pad theme of Notes, and the book-like appearance of Contacts, have been removed from the UI.
Timer coalescing, which enhances energy efficiency by reducing CPU usage by up to 72 percent.
App Nap, which sleeps apps that are not currently visible.
Compressed Memory, a virtual memory compression system which automatically compresses data from inactive apps when approaching maximum memory capacity.
Server Message Block version 2 (SMB2) is now the default protocol for sharing files.
LinkedIn sharing integration
OpenGL 4.1 Core Profile.
OpenCL 1.2.
USB syncing of calendar, contacts and other information to iOS devices has been removed, instead requiring the use of iCloud.
Some system alerts, such as low battery and removal of drives without ejecting, have been moved to Notification Center.
The Open Transport API has been removed.
Quicktime 10 does not support many older video codecs and converts them to the ProRes format when opened. Older video codecs cannot be viewed in Quick Look.
Improved Privacy: Safari now supports browsing in private browsing mode with certain windows (as opposed to all the windows having to be either in or out of private browsing).^{[citation needed]}
The "traffic light" close, minimize, and maximize window buttons have appeared somewhat brighter.
IPoTB (Internet Protocol over Thunderbolt Bridge) Thunderbolt networking.

Reception

OS X Mavericks has received a mixture of positive and negative reviews on the Mac App Store but Macintosh owners have welcomed its availability free of charge. A purchaser of a new Macintosh with Mavericks installed receives Apple's iWork productivity suite for free as well.
One complaint is that Apple removed the local sync services, which forces users to get iCloud to sync iOS devices with the desktop OS^. However, this feature has since returned in the 10.9.3 and iTunes 11.2 updates.

Design

Yosemite introduced a major overhaul of OS X's user interface. Its graphics replaced skeuomorphism with flat graphic design and blurred translucency effects, following the aesthetic introduced with iOS 7. Some icons have been changed to correspond with those of iOS 7 and iOS 8. Yosemite maintains the OS X desktop metaphor.
Other design changes include new icons, light and dark color schemes, and the replacement of Lucida Grande with Helvetica Neue as the default system typeface.^] The Dock is now a 2D translucent rectangle instead of a skeuomorphic glass shelf, reminiscent of the Dock design used in early versions of OS X through Tiger and in iOS since iOS 7.

Other

Spotlight is a more prominent part of the operating system; it now displays its search box in the center of the screen and can include results from online sources, including Bing, Maps, and Wikipedia. Stock applications such as Safari and Mail have been updated. In particular, many security features have been added to Safari, such as a custom history clearing option that lets users clear history, cookies, and other data from the previous hour, day, or two days. In addition, Apple added DuckDuckGo to its search offerings, a non-tracking search engine that doesn’t store users’ data.
The green "zoom" button on windows now has a different function in applications that support full screen mode. Instead of simply enlarging the window, the button now enters full screen mode, eliminating the full screen button at the top right corner of windows that has been present since Mac OS X Lion. However, holding the Option key (⌥) while clicking the zoom button or double-clicking on the window chrome continues to invoke the original behavior.
JavaScript for Automation (JXA) is the new system-wide support for scripting with JavaScript, built upon JavaScriptCore and the Open Scripting Architecture.It features an Objective-C bridge which enables entire Cocoa applications to be programmed in JavaScript.
Along with other framework changes, CloudKit was integrated in this release. CloudKit functions as a Mobile Backend as a Service (MBaaS) and is one method for App developers to integrate access to Apple’s iCloud servers into their apps.

Beta testing

Apple initiated a new public beta program for OS X, a practice not seen with its operating systems since 2000's US$29.95 Mac OS X Public Beta, which had preceded the release of Mac OS X v10.0. Yosemite is part of the OS X Beta Seed Program, a public program that allows the first 1 million users to download and test the Yosemite beta at no charge. Beta testers are required to acknowledge the potential risks involved with prerelease software, and sign a non-disclosure agreement (NDA).The program began releasing Public Betas on July 24, 2014. Six public betas of Yosemite were released.

Images:

OS X 10.10 Yosemite
A version of the macOS operating system

The desktop of OS X Yosemite. Note how the Dock and Icons are different from previous versions of Mac OS X.
Developer	Apple Inc.
OS family	Macintosh Unix
Source model	Closed source (with open source components)
Released to manufacturing	October 16, 2014; 2 years ago
Latest release	10.10.5 (Build 14F27) / August 13, 2015; 16 months ago
Update method	Mac App Store
Platforms	x86-64
Kernel type	Hybrid (XNU)
License	APSL and Apple EULA
Preceded by	OS X 10.9 Mavericks
Succeeded by	OS X 10.11 El Capitan
Official website	OS X Yosemite at the Wayback Machine (archived August 28, 2015)