OS X 10.9
| A version of the macOS operating system | |
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| Developer | Apple Inc. |
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| OS family | |
| Source model | Closed source (with open source components) |
| Released to manufacturing |
October 22, 2013 |
| Latest release | 10.9.5 (Build 13F1712) / March 21, 2016 |
| Update method | Mac App Store |
| Platforms | x86-64 |
| Kernel type | Hybrid (XNU) |
| License | APSL, BSD, GPL v2, and Apple EULA and NDA |
| Preceded by | OS X 10.8 Mountain Lion |
| Succeeded by | OS X 10.10 Yosemite |
| Official website | OS X Mavericks at the Wayback Machine (archived October 15, 2014)‹The template is being considered for merging.› |
| Support status | |
| Unsupported as of September 2016 | |
OS X Mavericks (version 10.9) is the tenth major release of OS X (now named macOS), Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mavericks was announced on June 10, 2013, at WWDC 2013, and was released on October 22, 2013, as a free upgrade through the Mac App Store worldwide.
The update emphasized battery life, Finder improvements, other improvements for power users, and continued iCloud integration, as well as bringing more of Apple's iOS apps to OS X. Mavericks, which was named after the surfing location in California, was the first in the series of OS X releases named for places in Apple's home state; earlier releases used the names of big cats.
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.
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