Beta 5 of iOS 10.3.3 and macOS 10.12.6 Out for Testing
Apple has released the fifth beta versions of macOS 10.12.6 and iOS 10.3.3 to users participating in the relevant beta testing programs.
Users who are participating in the beta testing programs can find iOS 10.3.3 beta 5 via the Software Update mechanism of iOS Settings, and macOS 10.12.6 beta 5 can be found via the App Store Updates section.
iOS 10.3.3 beta 5 appears to be mostly a bug fix release and does not include any notable changes, it has also largely be overshadowed by the ongoing iOS 11 public beta, which is available to download and install right now and brings with it much more significant features and changes.
macOS 10.12.6 beta 5 appears to focus on a few particular bug fixes and security enhancements, and also does not include any significant new features or changes. The macOS 10.13 High Sierra public beta with its variety of new changes is yet to be released however, and currently remains as a developer beta instead.
Apple usually goes through a variety of beta releases before issuing the final version, perhaps suggesting a final build of iOS 10.3.3 and MacOS 10.12.6 could be released sometime in the coming weeks.
Meanwhile, iOS 11 and MacOS High Sierra are both due as final releases in the fall.