Apple has just released the second developer beta of OS X El Capitan 10.11.6. Developers will find the configuration utility needed to install the release at Apple's Mac Developer Resource Center. 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 10.11.6 Beta 2 heads out to developers

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.