As we noted on Wednesday, Apple has seeded the first build of OS X 10.8.1 to developers according to 9to5Mac.



The release has a build number of 12B13 and Apple reports no known issues, but asks developers to focus on wide variety of areas for their testing. The delta update — where only items that have changed are downloaded — weighs in at 36.4MB.





According to 9to5Mac, developers have been asked to test Active Directory, Microsoft Exchange in Mail, PAC proxies in Safari, SMB, USB, and Wi-Fi and audio when connected to the Apple Thunderbolt display.



The OS X 10.8.1 seed is available for download via the OS X Developer portal at developer.apple.com.