Apple has just seeded the fourth beta of OS X 10.11.4 to public beta testers, just a day after releasing the fourth OS X 10.11.4 beta to developers and a month after releasing OS X 10.11.3.
OS X 10.11.4 focuses primarily on under-the-hood bug fixes, security enhancements, and performance optimizations, but there have been a few outward-facing changes. In the Notes app, OS X 10.11.4
The fourth beta is available through the Software Update mechanism in the Mac AppStore for those who are enrolled in Apple’s beta testing program. Those wishing to join the program can sign up on Apple’s beta testing website.
Apple is likely to release OS X 10.11.4 in the spring, alongside iOS 9.3, watchOS 2.2, and tvOS 9.2.
Apple Seeds OS X 10.11.4 El Capitan Beta 4 to Public Beta Testers