Apple has released software updates to both of their already acknowledged, unreleased Mac OS X updates: Mountain Lion and Lion 10.7.4. The OS X Mountain Lion is a not a full new Developer Preview, but is simply an update to the already released Developer Preview 3. Changes are currently unknown, but please send in anything you find to tips@9to5mac.com. The update weighs in at 1.45GB on a MacBook Air, but that may vary on other machines. Similiarly, Apple released a few minor developer preview updates during the OS X Lion beta period.

In addition, Apple has seeded a new build of 10.7.4 to developers. The build number is 11E53, and this is notable as this is only a single build shift from last week’s release of 10.7.4 build 11E52. A slow down in build number changes often means an imminent release of whatever OS X update is being tested. Augmenting this possibility is that Apple has added the 10.7.4 change log to the installer application for the beta. Apple says the build has no known issues but asks developers to focus their testing on graphics, iCal, Mail, Printing, and Time Machine.

Apple has also released Developer Preview 4 of Xcode 4.4. The Xcode preview requires either OS X Mountain Lion or OS X Lion.

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