Instantly releasing the new update versions. Fourth macOS 10.12.5 was released by Apple just before a week ago. But now macOS 10.12.5 fifth version is also rolling out. Apple recently made it available for developers. So, public version will roll out soon as it will always made available couple of days after the developer version.
The Fifth version of Sierra 10.12.5 beta will be made available on Mac App Store. This upcoming Sierra 10.12.5 beta version follows the macOS 10.12.4 which feature the Aplle color night mode on Mac for the first time. And you might all know that Apple is running developers betas for iOS 10.3.2, watchOS 10.2.2 and tvOS 10.2.1. From 9TO5 Mac report.
According to some tech reports this update is going to be considered as a minor update to fix bugs and security improvement as the company is going to launch a new update 10.13 follow by the latest updates later at the end of year.
According to 9TO5Mac, Apple will unveil the update macOS 10.13 on June 5th at WWDC 2017.