Apple has released the third macOS 10.14.4 developer beta for testing before the official release for all customers. The new building is available as a software update from the Software Update section of the System Preferences app on Mac.
The update is also listed on Apple's developer downloads website, but no new beta versions of iOS, watchOS, or tvOS are included for today. Apple usually updates each version at the same time, so this suggests that we won't see new beta versions of Apple's other platforms today (unless they follow several hours).
macOS 10.14.4 includes support for smart TVs in Apple's home program, Apple News in Canada with bilingual support for the first time, and other changes. Apple has several changes coming to the iPhone and iPad through iOS 1
We update our coverage if any new and notable changes are detected in the latest macOS Mojave beta update.