Apple has released a supplemental security update for OS X El Capitan, the version prior to macOS Sierra. The update weighs 623.9MB and it can be downloaded right away if you enter the Mac App Store and have a compatible Mac.
As we say in the title of the news, it is a supplementary security update for OS X 10.11.6 that would solve the kernel problems on certain Macs.
The supplemental security update that Apple has made available to all users who currently have OS X 10.11.6 El Capitan installed, comes with a fix to help solve a problem that was occurring in the core of Macs that was causing occasionally they did not respond. Users who have the system version installed OS X El Capitan 10.11.6 can find security update 2016-003 on the Updates tab of the Mac App Store.
The list of security changes that come with the update should be available shortly on Apple's security updates page. To find out much more information about the update we are talking about, consult Apple's support document for more information as the company always recommends. As you know, it is always better to wait a few days for the developers to verify the stability of the update so that in case there is a problem, do not be left without being able to use your computer.