July 18, 2026
Apple Seeds New OS X Mountain Lion 10.8.5 Build 12F36 to Developers for Testing

Apple Seeds New OS X Mountain Lion 10.8.5 Build 12F36 to Developers for Testing

Posted September 5, 2013 at 2:25am by
Apple has seeded a new build of OS X Mountain Lion 10.8.5 to developers for testing. The build number is 12F36. The previous build was 12F33 and was seeded a month ago. It was widely expected that the 10.8.5 would be released last week after select partners received a pre-release build 12F35.

The rumored 12F35 build reportedly included the following changes:


● Fixes an issue that may prevent Mail from displaying messages
● Improves AFP file transfer performance over 802.11ac Wi-Fi
● Resolves an issue that may prevent a screen saver from starting automatically
● Improves Xsan reliability

No word on what improvements or changes have been made in this build . Apple has previously indicated that developers should focus on Wi-Fi
, Graphics, Wake from Sleep, PDF viewing and Accessibility and Mobile Device Management.

A new Safari Beta was also pushed out today to developers as well.

Apple Seeds New OS X Mountain Lion 10.8.5 Build 12F36 to Developers for Testing
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