In this eighth beta for Apple OS X developers (the sixth version for those involved in the OS X El Capitan public beta), Apple continues to improve and polish the latest operating system for Mac.
Build 15A279b, as it’s cleverly named, doesn’t have a lot of notes about what’s changing, but we can assume there will be a bunch of internal fixes that may not be readily apparent to the average user.
You do need to either be a registered Apple developer or public beta tester, you need to be using a 64-bit, Intel-based Mac and running at least Mac OS X 10.6.7 to get this new seed. You’ll also need 8GB of free disk space, and Xcode 7 to develop apps for OS X El Capitan, also known as OS X 10.11.

Screen: Rob LeFebvre/Cult of Mac
“If you have OS X v10.11 installed,” writes Apple on its developer page, “download this update by clicking Updates in the toolbar of the Mac App Store. If you do not have OS X 10.11 installed, use your download code on the Mac App Store to get started.”
The last several beta seeds have been pretty empty of forward-facing or visual changes. While the fifth El Capitan beta brought a new colored OS X logo in the About This Mac section, the sixth and seventh betas, like this one, focused mostly on performance improvements and bug fixes.