Apple recently released a beta build of OS X Mavericks 10.9.5 build 13F24 to developers. This comes just a week after the fourth OS X 10.9.5 build 13F18 beta was seeded to developers. It’s also been more than a month OS X 10.9.4 was release to the public. Aspects the Cupertino-based company asked developer’s to work on include USB Smart, USB, Thunderbolt, Gatekeeper, Thunderbolt, Safari, and Graphics.

We’re not sure exactly what type of improvements 10.9.5 will bring to Mavericks, however it is likely stability enhancements and bug fixes will be improved upon. OS X Yosemite and iOS 8 are also being tested by Apple right now, both are expected to be released this fall. Developers can download OS X Mavericks 10.9.5 build 13F24 via Software Update in the Mac App Store.

Source: Apple