Apple's pre-release build of OS X 10.8.1 Mountain Lion has improved MacBook battery life by as much as four hours, according to one developer.

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In response to an Apple Support Communities forum thread, a report on Tuesday offers anecdotal evidence that the new OS X 10.8 Mountain Lion may be causing battery life issues for some MacBook users.

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A number of MacBook Pro and MacBook Air owners who updated to the recently-released OS X Mountain Lion are complaining of battery performance issues, with some reporting their batteries only last half as long as when OS X 10.7 Lion was installed.

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Apple's newly updated Mac operating system, OS X 10.8 Mountain Lion, has been downloaded more than 3 million times in its first four days, the company announced on Monday.

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Apple on Friday rolled out a firmware update for the 15-inch MacBook Pro with Retina display enabling Mountain Lion's new Power Nap feature two days following the new operating system's release.

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After being on the market for just 48 hours, OS X 10.8 Mountain Lion is already accounting for 3.2 percent of all Mac web traffic and is on track to become one of the most quickly adopted operating systems in history.

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Tom and Jill are going uphill, version 2.0 that is. The high quality voices, first introduced in OS X Lion as optional downloads, now have updates available through Software Update.

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Incomplete downloads in OS X 10.8 Mountain Lion show a "Date Modified" of Jan. 24, 1984, a reference to the day when Apple's very first Macintosh was unveiled by Steve Jobs.

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Apple on Wednesday pulled its last-generation OS X Lion from both the Mac App Store and brick-and-mortar Apple Stores amid the launch of OS X 10.8 Mountain Lion OS.

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A number of customers who recently bought a Mac and are looking to upgrade to Mountain Lion through Apple's OS X Up-to-Date program have been met with error messages telling them their redemption code has already been used.

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Along with Wednesday's release of OS X 10.8 Mountain Lion, Apple released Mountain Lion Server as a $19.99 upgrade on the Mac App Store, while Xcode 4.4 was also provided to developers, and Apple Remote Desktop also received an update.

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Apple on Wednesday updated all three applications in its iWork productivity suite, as well as iPhoto, iMovie and Aperture, to take advantage of new features in Mountain Lion.

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With the launch of OS X 10.8 Mountain Lion on Wednesday, review embargoes were lifted, and tech pundits heaped praise on the value offered by Apple in its $19.99 operating system upgrade.

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With more than 200 new features, OS X 10.8 Mountain Lion launched on the Mac App Store on Wednesday as a $19.99 upgrade from Lion or Snow Leopard.

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Apple announced on Tuesday that OS X 10.8 Mountain Lion, its next-generation Mac operating system, will hit the Mac App Store on Wednesday, July 25.

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In OS X Mountain Lion, Apple has split Notes off from Mail as its own app, mirroring iOS. Additionally, Mail gets new VIP contact, notification and search features, while the all new Notes app for OS X provides a new option for drafting ideas that are kept up to date across all your devices via iCloud.

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In OS X Mountain Lion, Apple has replaced iCal with two separate Calendar and Reminders apps, harmonizing with iOS and improving the overall interface while making Reminders not just calendar event with alarms, but also location-based notifications.

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In OS X Mountain Lion, Apple has replaced Address Book with Contacts, bringing the simpler OS naming convention to OS X and adding a variety of new improvements, including easy sharing, card linking between different accounts and (later this year) Facebook integration.

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In OS X Mountain Lion, Apple has taken an incremental step toward making OS X's new iPad-like Full Screen mode more useful: you can now pick which connected display you want to use.

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In OS X Mountain Lion, iCloud begins to take shape as the smart, automated way to store documents on a per-app, device independent basis, incrementally displacing the local file system that non-technical users have long struggled to comprehend and replacing it with a cloud-based service that connects and synchronizes desktop and mobile devices via the Internet.

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