Apple developers have started receiving a beta of OS X 10.8.1, the first update to Mountain Lion since its release on July 25. While the release note accompanying the update lists no known issues, Apple does ask developers to focus testing on several areas -- including Wi-Fi and audio when connected to an Apple Thunderbolt Display, a noise issue tested extensively by MacNN last month. The new build is number 12B13 and is 38.5MB in size.
