Yesterday we saw the arrival of the beta version for macOS Sierra 10.12.1 developers and it was released together with the version for users who are within the beta program that Apple has. These user beta versions are practically the same as the developer versions in terms of beta content.
The new public macOS Sierra beta 2 is undoubtedly a passing version and in which the errors of the previous version are improved or solved, but Apple will not stop launching these new betas over the weeks and seen what it seems it won't wait long to release the next beta 3.
In this way, Apple gets more feedback on the beta version and has a wider margin of maneuver for the following versions. The good thing about this for the user is to be able to have before most users the news installed on the Mac, that is, in this case it is already about improvement versions and few important news regarding use we will find.
If you are in the public beta program, it does not require you to download the installer and the update will appear directly in the application store for Mac, the Mac App Store in the Updates tab. If, on the other hand, you have not yet encouraged yourself to try Apple's betas and you have just signed up for the program that Apple has open for all users, first you will have to download the installer from the website through a code that is it redeems automatically in the Mac App Store and my advice is that you install this beta version on a partition separate from the operating system you use for your day to day, never use a beta as the official version.