The latest Mavericks beta, dubbed Build 13A598, comes just over two weeks after the previous version was seeded in mid-September.
People familiar with the seed note the email no longer contains the words "Developer Preview," as did all previous versions up to this point. As seen above, the title has been changed to "OS X Mavericks."
As with the most recent developer previews, today's seed comes with no major changes to the forthcoming OS, people familiar with the release said.
When Apple launches OS X 10.9 Mavericks later this fall, it will come with iBooks, Finder Tabs, Maps, App Nap and Compressed Memory, among other new features.
Members of the AppleSeed program can download the OS X 10.9 Mavericks via Software Update in the Mac App Store.