Most recently Apple macOS High Sierra 10.13.2 publicly released, but the company continues to move forward and test beta versions of the next update.
Today Apple has released the fifth beta of macOS High Sierra 10.13.3 for developers. Thus, the company provides developers with the opportunity to prepare their programs for the next update.
To install the update, registered developers can go to Mac App Store and go to the Updates tab. The new version will be there. Alternatively, the update can be downloaded directly from the Apple Developer Center.
The new version has just been released, so so far no new features or changes have been found in it. So far, we can assume that this is the next update, aimed at fixing bugs and improving the system.
The corresponding public beta should be out soon. It can be downloaded by beta testing program participants. It is still unknown when the final version will be released, but it is likely that it will happen soon.