Apple has today seeded the sixth beta of OS X El Capitan to developers. This comes a week after releasing the fifth beta. We’re not sure why Apple is seeding these betas so soon together. This update has bug fixes and improvements over the last seed.
Developers can update to beta 6 in the Mac App Store > Updates > Software updates > OS X 10.11 beta 6. If you don’t have it yet you can download it for the first time from the Mac Developer Center.