MacOS Sierra 10.12.6 for Poppy, iMac si MacBook Was released shortly. As with iOS 10.3.3, the new version of the Sierra makes no visible changes, but only solves security and stability issues that Apple does not offer much detail about. In this regard, Apple's policy is very clear. Not Reveals vulnerabilities Discovered in their own systems, so that they can not be exploited by malicious people.
What we know about this update is that it comes "packed" with an update for iTunes. Apple's synchronization, media, and management app reached 12.6.2 version, and the iTunes update is available on both MacOS and the Windows.
Download & Install MacOS Sierra 10.12.6
Normally, in 24-48 hours after the release of the update, all users are notified through the Notification Center about download and installation. If this notification does not appear, go to App Store > Updates.
Apple is preparing in the fall of this year to launch the next major operating system for Mac, MacOS High Sierra.