In addition to releasing the first beta versions of iOS 9.3, 9.2 tvOS for a set-top box Apple TV and watch watchOS 2.2, Apple released Pervyy beta to developers for testing for the desktop platform OS X El Capitan.
Beta OS X 10.11.4 El Capitan came out a month after the release of the second major update El Capitan, OS X 10.11.2. Interestingly, the version of OS X 10.11.3 is now in the testing phase by developers and me. Thus, OS X 10.11.4 will be the fourth operating system upgrade El Capitan.
Apple hasn’t announced any details about changes in the update. Presumably, the developers will focus on strengthening security, stability and squashing bugs.