Last week they did not launch beta of the new version of the operating system for Macs and it is that the previous week a revision of beta 2 was launched. Today if the developers arrive macOS High Sierra beta 3.
In this case the new version is available to developers and users who are registered in the beta program. Apple does not want to waste a lot of time and releases this version so that all beta testers can launch the installation on Macs. In addition to the third beta version of macOS High Sierra, the beta versions of the rest of iOS and tvOS have been released.
It is early to say if these versions add news since they have just been launched and they don't seem to have too many changes in terms of functions, but ultimately what they are sure to add is the typical bug fixes, improvements in system stability and the news of the first beta version released by Apple for developers at the beginning of June.
Apple has been with the public beta program for a long time and obviously it is important to note that these are beta versions that may contain bugs or errors, as well as being incompatible with some applications or tools that we use in our day to day life. So the best thing is that if you want to try these public beta the best thing is that you have a partition on the disk or even an external disk for installation and avoid problems. If there are notable news in this third beta version, we will publish them in this same article.