The truth is that it has cost but we already have the public beta of macOS Sierra 10.12.4 available for download. In this new beta version that comes a day after the launch of beta 2 for developers, we find the Night Shift improvement implemented and the rest of the news that are perhaps less prominent for the user, such as the results of the cricket league or SiriKit. These and all bug fixes and other improvements implemented in the system are now available on the web for users who want to test the public beta on their Macs.
When and we thought yesterday that they would not launch the public beta Apple released it after the Safari Technology Preview beta. The outstanding improvement is undoubtedly the option to enable the night mode or Night Shift that all or almost all of us already know from iOS. This function for those who do not know it simply serves to give a warmer tone to the screen and in this way "less tiring" the eyes with the continuous exposure to the Mac screen.
In this case, the new version is available to all users who adhere to the Apple Software Beta Program in which anyone can be a participant. In principle and as we have said on previous occasions, the best thing to install these beta versions is to do it on a separate partition from our main system or on an external hard drive. We warn you of this to avoid possible compatibility problems with some applications or tools that we use in our day-to-day lives, obviously everyone can do whatever they want, it is true that we are facing a beta version and measures must be taken to avoid unexpected problems or failures despite the stability and good performance that the version may have.