OS X 10.8 Mountain Lion Developer Preview 4 Build 12A239

MACOSX. June 13, 2012 by nico.


This is OS X 10.8 Developer Preview 4, believed by some, but not confirmed, to be the Golden Master. The seed notes can be found below.

OS X 10.8 Mountain Lion Developer Preview 4 (Build 12A239)

OS X Mountain Lion Developer Preview 4 Seed Note

OS X Mountain Lion Developer Preview 4 is prerelease software. Do not use this prerelease software in a commercial operating environment or with important data. You should back up all of your data before installing this software and regularly back up data while using the software. You will not be able to upgrade from the OS X Mountain Lion Developer Preview to the final release.

If an installation of OS X Developer Preview 4 fails, try using Disk Utility from a Recovery HD to repair the disk.

Architecture Requirements

The OS X Mountain Lion Developer Preview supports the following Macs:
• iMac (Mid 2007 or newer)
• MacBook (Late 2008 Aluminum, or Early 2009 or newer)
• MacBook Pro (Mid/Late 2007 or newer)
• MacBook Air (Late 2008 or newer)
• Mac mini (Early 2009 or newer)
• Mac Pro (Early 2008 or newer)
• Xserve (Early 2009)
Known Issues

Network Migration requires OS X 10.7.3 or later in this Developer Preview
⁃ International users may be unable to enter a Wi-Fi password while in Setup Assistant. Users can select Other Network Options and continue setting up their system without a Wi-Fi network

On systems with FileVault enabled, the login window may be displayed incorrectly
Rotating an external display may cause a panic on AMD Radeon-based machines
QuickTime screen recordings may produce corrupted videos or cause an exception when run on machines with NVDIA graphics
Installation of Final Cut Studio 3 may cause a hang unless Automatic Graphics Switching is disabled in Energy Saver Preferences
Game Center

In this seed, the Game Center application will view Production data by default. Games in development will be programmatically switched to use the Sandbox server environment
No Top Games are displayed on the Me tab and no game recommendations are shown on the Games tab
To use Game Center in your game on OS X, you must install a provisioning profile that enables Game Center for your app. Code signing, entitlements, and provisioning profiles are all described in detail in Tools Workflow Guide for Mac
Tell-a-Friend functionality is not available
The local peer-to-peer GameKit API (GKSession, GKPeerPickerController, and related classes) is not supported

OSXInstall_Mountain_Lion_DP4.dmg





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