As we all know when new versions of Apple OS are coming, the company begins to use them internally through its own engineers or workers. In this case it's all part of the development of the macOS 10.14 and iOS 12 operating system which are beginning to be seen in programs that analyze the traffic of web pages.
All this is common and more so considering that the month of June is getting closer and closer, there is little time left and there is much work to be done. Ultimately you can see a high rebound in visits to some sites made with Safari, this is the test that the company is testing these with more intensity versions that will arrive on June 4.
At 9To5Mac, they have noticed this increase in visits with the new OS versions and are making it public. In this case you can see in the graph the considerable increase during this end of April, but since the month of March that the tests are being carried out:
We imagine that they will also be testing the watchOS and tvOS versions, but in this sense it is impossible to see through network logs or web page browsing. As for the news of the macOS and iOS versions, little or nothing can be said that is not already known, but what is clear is that Apple is committed to improving the integration between applications of the two systems and surely a lot will be added of improvements regarding the stability and functionality of both. We will see what these new versions have in store for us at the beginning of June so there is not that much missing either.
