Apple Seeds OS X 10.11.5 El Capitan Beta 2 to Developers
Aside from seeding the second beta of iOS 9.3.2 to developers for testing, Apple has released OS X 10.11.5 El Capitan Beta 2. The most-recent update is available through Apple’s dev portal or via Software Update mechanism of the Mac App Store and contains minor stability and performance improvements.
OS X 10.11.5 Beta 2 has a build number 15F24b. Unfortunately, it is not clear what new features it brings.
If you have a compatible Mac model and a developer account, you can download and install the latest update right now. However, if you don’t need it for testing purposes, it’s better to stay away from OS X 10.11.5 El Capitan Beta 2.