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OS X Mountain Lion (version 10.8) is the ninth major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mountain Lion was released on July 25, 2012, [3] for purchase and download through the Mac App Store, as part of a switch to releasing OS X versions online and every year, rather than every two years.
Mac OS X 10.8.4 "Mountain Lion" or later: Type: Integrated Development Environment (IDE) ... For testing purposes, iAd Producer leverages Mac OS X, Safari, ...
It runs on both Mac OS X Lion (10.7) and OS X Mountain Lion (10.8) and is the first version of Xcode to contain the OS X 10.8 "Mountain Lion" SDK. Xcode 4.4 includes support for automatic synthesizing of declared properties, new Objective-C features such as literal syntax and subscripting, improved localization, and more. [ 40 ]
The last Wayback Machine capture of the Mac OS Forge area for launchd was in June 2012, [9] and the most recent open source version from Apple was 842.92.1 in code for OS X 10.9.5. In 2014, with OS X 10.10 and iOS 8, Apple moved code for launchd to closed source libxpc.
The Mid 2013 model is second MacBook Air that supported 9 macOS versions, OS X Mountain Lion 10.8 through macOS Big Sur 11. In March 2015, the models were refreshed with Broadwell processors, Intel HD Graphics 6000, Thunderbolt 2, and faster storage and memory. [42]
Mach was initially hosted as additional code written directly into the existing 4.2BSD kernel, allowing the team to work on the system long before it was complete. Work started with the already functional Accent IPC/port system, and moved on to the other key portions of the OS: tasks, threads, and virtual memory.