OS X Mountain Lion
| A version of the macOS operating system | |
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Screenshot of OS X Mountain Lion
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| Developer | Apple Inc. |
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| OS family | |
| Source model | Closed source (with open source components) |
| Released to manufacturing |
July 25, 2012 |
| Latest release | 10.8.5 (Build 12F45) / October 3, 2013 |
| Platforms | x86-64 |
| Kernel type | Hybrid (XNU) |
| License | Apple Public Source License (APSL) and Apple end-user license agreement (EULA) |
| Preceded by | Mac OS X 10.7 Lion |
| Succeeded by | OS X 10.9 Mavericks |
| Official website | OS X Mountain Lion at the Wayback Machine (archived October 18, 2013) |
| Support status | |
| Unsupported as of about September 2015iTunes support ended in August 2016 | |
| Articles in the series | |
OS X Mountain Lion (version 10.8) is the ninth major release of OS X (now named macOS), Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mountain Lion was released on July 25, 2012 for purchase and download through Apple's Mac App Store, as part of a switch to releasing OS X versions online and every year. Named to signify its status as a refinement of the previous Mac OS X version, Lion, Apple's stated aims in developing Mountain Lion were to allow users to more easily manage and synchronise content between multiple Apple devices and to make the operating system more familiar. Mountain Lion is also the final version of OS X to be developed under the supervision of then-OS X head Scott Forstall.
The operating system gained the new malware-blocking system Gatekeeper and integration with Apple's online Game Center and iCloud services, while the Safari web browser was updated to version 6. As on iOS, Notes and Reminders became full applications, separate from Mail and Calendar, while the iChat application was replaced with a version of iOS's Messages. Mountain Lion also added a version of iOS's Notification Center, which groups updates from different applications in one place. Integrated links allowing the user to rapidly transfer content to Twitter were present in the operating system from launch. Facebook integration was also planned but unfinished at launch date. It was released as a downloadable update later.
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