Following the release of the first beta for Mac OS X 10.9.1 being released to developers in the middle of November, Apple has issued a pre-release of Mavericks to developers.

The new OS X 10.9.1 Beta is labelled build 13B40 and was posted on December 3rd 2013 which seems to focus on Apple Mail, Safari, VoiceOver, and graphics drivers.


According to the changelog for the new OS X 10.9.1 Beta, the update contains the following:

  • Improved support for Gmail pinnacle OS X mail, and fixes for users with custom Gmail settings
  • Improves the reliability of Smart Mailboxes and search in Mail
  • Fixes an issue that prevented contact groups from working properly in Mail
  • Resolves an issue that prevented VoiceOver from speaking sentences that contain emoji
  • Updates Shared Links periodically when open in the Safari Sidebar

Registered Mac OS X developers can head over to the Dev Center to find the download link in order to install the new OS X 10.9.1 Beta.

If we’ve left out anything that differs on this new Beta than the old, please drop us a comment in the section below.