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Apple on Friday evening began providing its developers with the first maintenance update to its Mac OS X 10.8 Mountain Lion operating system released just weeks ago.

People familiar with the matter say the 38.5MB beta release was accompanied with a set of release notes identifying no known issues.

Instead, the Mac maker asked developers to focus their testing efforts around USB, PAC proxies in Safari, Active Directory and Microsoft Exchange support in Mail.

Interestingly, Apple also made a specific request for testers to evaluate WiFi and audio when connected to a Thunderbolt display, suggesting some issues existed in these fields under the gold master of Mac OS X 10.8 released last month.

Apple has historically aimed to push out its first maintenance release for major operating systems in a swift manner, suggesting we could see a formal release of the software in the coming weeks.

Mac OS X 10.8.1 surfaced in the news just hours ago when it was listed as part of a system profile for an unreleased 13-inch MacBook Pro with Retina display that was apparently used to submit benchmark scores to Geekbench.