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Apple seeds OS X Mountain Lion 10.8.3 build 12D54 to developers

Apple just made OS X Mountain Lion 10.8.3 build 12D54 available to testers after releasing build 12D50 earlier this month on Jan. 8 with no known issues. Apple said the new build includes significant changes to Wi-Fi and listed the following focus areas for developers: AirPlay • AirPort • Game Center • Graphics Drivers • Safari.

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Avatar for Jordan Kahn Jordan Kahn

Jordan writes about all things Apple as Senior Editor of 9to5Mac, & contributes to 9to5Google, 9to5Toys, & Electrek.co. He also co-authors 9to5Mac’s Logic Pros series.


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