Apple launched last night the Second beta of OS X El Capitan 10.11.3 for developers. This new beta version corresponds to build 15D13b and in it we will find little news in terms of new functions and others, obviously the improvements of this new version for developers are aimed at correcting the errors and bugs of the previous beta.
System stability and security improvements or typical bug fixes are the main novelties of the new beta, now it remains to be seen if in addition to this there is any novelty in the lines of code discovered by the developers, but in principle it does not seem that we are going to have any news in this regard.
In the line of what these beta has been, we can say that Apple is polishing the operating system to the maximum even though many users continue to comment that the current version of OS X El Capitan has brought them more errors and problems than expected. . In my personal case I always say that it is an improved version of OS X Yosemite and it works perfectly for me, but each Mac is a world.
As I always say in these beta versions that Apple releases for OS X (although they are versions for developers and beta testers) is that are not used as the primary operating system although they can be stable and work perfectly, as some applications may not be adapted to beta and stop working for whatever reason.