OS X Mavericks

Apple announced OS X Mavericks on June 10, 2013, during the company's Apple Worldwide Developers Conference (WWDC) keynote (which also introduced iOS 7, a revised MacBook Air, the sixth-generation AirPort Extreme, the fifth-generation AirPort Time Capsule, and a redesigned Mac Pro). During a keynote on October 22, 2013, Apple announced that the official release of 10.9 on the Mac App Store would be available immediately, and that unlike previous versions of OS X, 10.9 would be available at no charge to all users running Snow Leopard (10.6.8) or later. On October 22, 2013, Apple offered free upgrades for life on OS X and iWork. ==System requirements==

All the Macs supporting OS X Mountain Lion support OS X Mavericks. As with Mountain Lion, 2 GB of RAM, 8 GB of available storage, and Mac OS X Snow Leopard or later are required. Mavericks and later versions are all available for free. The full list of compatible models: • iMac (Mid 2007 or later) • MacBook (Aluminum, Late 2008 or later) • MacBook Air (Late 2008 or later) • MacBook Pro (Mid 2007 or later) • Mac Mini (Early 2009 or later) • Mac Pro (Early 2008 or later) • Xserve (Early 2009) ==System features==

The menu bar and the Dock are available on each display. Additionally, AirPlay compatible displays such as the 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. Any app running on Mavericks can be eligible for this feature by default. Timer coalescing is a feature that enhances energy efficiency by reducing CPU usage by up to 72 percent. This allows MacBooks to run for longer periods of time and desktop Macs to run cooler. Apple now supports OpenGL 4.1 Core Profile and OpenCL 1.2. This is to increase performance and cross-platform compatibility. 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 and replaced with flat design similar to iOS 7. iCloud Keychain stores a user's usernames, passwords and Wi-Fi passwords to allow the user to fill this information into forms when needed. The system has native LinkedIn sharing integration. IPoTB (Internet Protocol over Thunderbolt Bridge) Thunderbolt networking is supported in Mavericks. This feature allows the user to quickly transfer a large amount of data between two Macs. Notification Center allows the user to reply to notifications instantly, allows websites to send notifications, and, when the user wakes up a Mac that was in a sleep state, displays a summary of missed notifications before the machine is unlocked. Some system alerts, such as low battery, removal of drives without ejecting, and a failed Time Machine backup have been moved to Notification Center. The "traffic light" close, minimize, and maximize window buttons have appeared somewhat brighter than OS X Lion and OS X Mountain Lion. ==App features==

Finder gets enhancements such as tabs, full-screen support, and document tags. Pinch-to-zoom and swipe-to-navigate-history gestures have been removed, although both are supported anywhere else. The new iBooks application allows the user to read books purchased through the iBooks Store. The app also allows the user to purchase new content from the iBooks Store, and a night mode to make it easier to read in dark environments. view the map of a specified location, A Top Sites view allows the user to quickly access the most viewed sites by default. However, the user can pin or remove websites from the view. The sidebar now allows the user to view their bookmarks, reading list and shared links. Safari can also auto-generate random passwords and remember them through iCloud Keychain. Additional changes were made to the messaging system. FaceTime is updated so that the user no longer needs to enable camera, in a similar manner to FaceTime in iOS 7. OS X Mavericks 10.9.2 added the option to block users in iMessage. ==Removed functionality==

The Open Transport API has been removed. USB syncing of calendar, contacts and other information to iOS devices has been removed, instead requiring the use of iCloud. QuickTime 10 no longer supports many older video codecs and converts them to the ProRes format when opened. Older video codecs cannot be viewed in Quick Look. Apple also removed the ability to sync mobile iCloud Notes if iOS devices were upgraded from iOS 8 to iOS 9, effectively forcing all Mavericks users to update or upgrade their computers. ==Reception==

OS X Mavericks has received mixed reviews. One complaint is that Apple removed the local sync services, which forces users to get iCloud to sync iOS devices with the desktop OS. CNET generalized OS X Mavericks as a "solid foundation" to OS X, lacking new features but praised it as a free update that incorporates additional iOS features. Criticism was brought to the insufficient updates to existing applications. ==Release history==