Apple has just released the first developer beta of OS X El Capitan 10.11.6. Interested developers will find the configuration utility needed to install the release can be found at Apple's Mac Developer Resource Center{.nofollow}. It can also be installed from the Updates section of the Mac App Store on a machine running the previous beta.

OS X El Capitan

It's not known at this time what OS X 10.11.6 brings along with it, though it likely contains some bug fixes and performance improvements.