This Mountain Lion Developer Preview is not fully localized. Clipped text, untranslated UI, and functional issues should be expected in languages other than English. System Requirements
OS X Mountain Lion requires a Mac with a 64-bit kernel. Mountain Lion supports the following Mac models:
iMac (mid 2007 or later)
MacBook (13-inch Aluminum, 2008), (13-inch, Early 2009 or later)
MacBook Pro (13-inch, Mid-2009 or later), (15-inch, 2.4/2.2 GHz), (17-inch, Late 2007 or later)
MacBook Air (Late 2008 or later)
Mac Mini (Early 2009 or later)
Mac Pro (Early 2008 or later)
Xserve (Early 2009) Known issues
32-bit kernel extensions are not supported in Mountain Lion
AirPlay mirroring is not supported with the with the current version of the Apple TV software
The Game Center Server environment is set to Sandbox. Existing Sandbox accounts may be used, or you may create a new account
In the Sandbox environment:
Game & Friend Recommendations are not supported
Friends can view games in common but not friends' other games
Photos are not supported
No email vetting and friend requests to un-vetted email addresses are allowed
No support for out of network friend requests is provided
Game matchmaking versioning restrictions are more relaxed
Some of the Game Detail information does not display (Game Provider, Pricing, etc.) in this Developer Preview
Search is not functional
No badges shown for Friend Requests
Peer-to-Peer GameKit API is not supported
Leaderboards, Achievements, or Players may be displayed incorrectly. To resolve this issue quit Game Center and re-launch The new Notes application does not currently import the following types of notes:
Notes existing in sub-folders of IMAP accounts
Local notes in an "On My Mac" account
Notes in these accounts will be available in Mail
Notes shared via Messages may not include note content
Screen Sharing may not work between OS X Mountain Lion and Snow Leopard or earlier OS X releases in this Developer Preview
AppleScript is not fully functional in this Developer Preview
AppleScripts used to launch Applications which are not already open will time out
AppleScripts may not be able to send AppleEvents to Mail
DVD Player may not launch after inserting a DVD on some systems
DVD Movie Playback does not work on certain NVIDIA GPUs
Horizontal metrics for Apple SD Gothic Neo are narrower than in AppleGothic. Applications localized to Korean may experience text layout underflow in multi-line text strings
Video content with displays that use HDCP may experience graphics corruption on certain NVIDIA GPUs
Enabling display rotation causes kernel panic on certain NVIDIA GPUs
Signing into Setup Assistant with your AppleID does not sign you into iCloud
NSDocument-based applications which use auto-save & iCloud entitlements will be opted into the new Document Library automatically. The option to disable this is not currently available
Kernel, kexts, and zones are now based at unpredictable addresses at each boot. The addresses in the kernel symbol table are unslid, and will not accurately reflect a running system. Provided that Xcode 4.4 gdb is used, KASLR is transparent to kernel debugging
To temporarily disable KASLR, set "slide=0" in the boot-args
Panics may occur when a Port Multiplier or PCI eSATA drive is attached
While booted into the Recovery Partition, you may be unable to connect to WiFi networks
Safari does not function in the Recovery Partition
Restoring from network backups in the Recovery Partition may fail
This build is being provided to you for testing and development purposes. Should you encounter any problems, please submit a bug report using the online Bug Reporter at ;. Please make sure to include "10.8 (12A128p)" in the bug title and description. This information will ensure that your bug is processed quickly.
When submitting a bug report, please make sure to include a Summary, Steps to Reproduce, Expected Results, Actual Results, and the diagnostic output generated by running ‘sudo sysdiagnose’ in the Terminal.
For complete instructions on submitting bug reports, please visit the Bug Reporting page at ;.
Thank you for your support.
Apple World Wide Developer Relations
Auto-Submission of Diagnostic and Usage Data
By default, OS X Mountain Lion Developer Preview builds automatically send anonymous diagnostic and usage data back to Apple. This includes information about crashes, freezes, kernel panics, and information about how you use Apple and third-party software, hardware, and services. This information is used to help Apple improve the quality and performance of its products and services. If necessary, this setting can be disabled in the Privacy tab in the Security & Privacy preference pane.
The software identified above is Apple Confidential Information and your use of such software is subject to the Apple Developer Connection Programs Terms and Conditions, including the Prototype License and Confidentiality Agreement attached thereto. Distributing the software to anyone other than an ADC member who is working for the same entity as you is considered a violation of your agreement with Apple and is damaging to both Apple and those who develop for the Apple platform. We sincerely appreciate your efforts to keep this software Confidential.
You agree that you will not export or reexport any of the software or Confidential Information received from Apple (a) into (or to a national or resident of) any U.S. embargoed countries (currently, Cuba, Iran, Libya, North Korea, Sudan, or Syria) without first obtaining proper authorization from the U.S. Government; or (b) to anyone on the U.S. Treasury Department's list of Specially Designated Nationals or the U.S. Department of Commerce Denied Person's List or Entity List. You also agree that you will not use said software for any purposes where prohibited by United States law, including, without limitation, the development, design, manufacture or production of nuclear, missile, chemical or biological weapons.
This Developer Preview seed note is an appendix to the Prototype License and Confidentiality Agreement between Apple Computer, Inc. and the addressee.