[Beta] Download OS X Mountain Lion 10.8.2 Build 12C43

Mountain Lion developers are being handed a new build of the 10.8.2 beta this week, along with instructions to focus their testing efforts on Power Nap, an exclusive feature introduced with Mountain Lion this year.

OS X Mountain Lion 10.8.2 Build 12C43 contains no known issues and surprisingly weighs in at 680MB for the both Delta and the Combo updates.

According to people who are familiar with the software, the new build asks developers to focus their attention on Power Nap, a feature exclusive to OS X 10.8 which enables portable Macs to stay up to date and perform automatic backups while in sleep mode.

“When your Mac goes to sleep, it still gets things done with Power Nap. It periodically updates Mail, Contacts, Calendar, Reminders, Notes, Photo Stream, Find My Mac, and Documents in the Cloud,” Apple states on the marketing pages of Mountain Lion.

“When your Mac is connected to a power source, it downloads software updates and makes backups with Time Machine. While all that updating is going on, the system sounds are silent and no lights or fans come on, so nothing disturbs you. And when your Mac wakes up, it’s good to go,” it adds.

The feature requires a Mac notebook with built-in flash storage. Examples include the MacBook Air line, and the all-new MacBook Pro with Retina display introduced earlier this year.

OS X 10.8.2 is the second incremental update lined up for users of Apple’s Mountain Lion operating system. Developers can download the new beta (build 12C43) over at Apple’s Mac Dev Center.

Installation Instructions
The OS X Mountain Lion 10.8.2 Update (Combo) updates
– OS X Mountain Lion 10.8, 10.8.1 GM, or previous seeds of 10.8.2.
The OS X Mountain Lion 10.8.2 Update (Delta) updates
– OS X Mountain Lion 10.8.1 GM or previous seed builds of 10.8.2.
Please be aware that you will not be able to revert back to your previous system after updating.
Please install this update on a system you are prepared to erase if necessary.
Known Issues
– None
Focus Areas
– Messages
– Facebook
– Game Center
– Safari
– Reminders
– Power Nap
Bug Reporting 
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 http://bugreporter.apple.com/.
Please make sure to include “10.8.2 (12C43)” 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.

 


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