Apple on Monday issued a third developer beta of its upcoming OS X 10.11.4 update, roughly two weeks after the release of the second.
The new version is listed as build 15E39c. Any feature additions are as yet unknown, though it should at least make further bug fixes. Developers can download it through the OS X Developer portal, or update an existing build via the Mac App Store.
Past betas of OS X 10.11.4 have already included a handful of new features, like individually encrypted items in Notes, and support for displaying the iPhone 6s's Live Photos in Messages.
Apple has separately released new betas of iOS 9.3, tvOS 9.2, and watchOS 2.2. iOS 9.3 will in fact make a variety of important additions, such as a Night Shift mode, and support for multiple users on educational iPads.
tvOS is being enhanced with support for folders, MapKit, Bluetooth keyboards, and iCloud Photo Library, and will also get a better app switcher. watchOS, meanwhile, is mostly revamping its Maps app and gaining the ability to pair multiple Apple Watches to a single iPhone.