Apple has released the third developer beta version of OS X El Capitan 10.11.6. Developers can head over to Apple's Developer Downloads page to grab the latest release, or to the Updates section of the Mac App Store on a machine running the previous beta.
Members of Apple's Beta Software Program can also grab a new public beta update. That is available through the Mac App Store on a registered Mac.
OS X 10.11.6 is likely to feature a number of bug fixes and performance improvements, though Apple has not yet detailed what we'll find when it arrives for consumers.