Apple issues Safari 11 update for macOS Sierra & OS X El Capitan
Though it's included by default with the upcoming macOS High Sierra, Apple on Tuesday released Safari 11 for macOS Sierra and OS X El Capitan, giving people early access to the finished browser's features.

The update -- available through the Mac App Store -- prevents audio from auto-playing on "most" websites, according to Apple. Users can also configure things like auto-play, content blockers, and Reader on a per-site basis, or make settings universal.
The browser also includes performance boosts, new controls for HTML audio and video, and better AutoFill accuracy when pulling data from Contacts.
macOS High Sierra is set to launch Sept. 25. In fact Safari 11 has long been available to people testing the beta and golden master versions of High Sierra, but until now getting it has required registering with Apple and installing potentially unstable code.
Other updates released today include Xcode 9, iOS 11 for iPhones, iPads, and iPods, tvOS 11 for the fourth-generation Apple TV, and watchOS 4 for the Apple Watch. Many first- and third-party mobile apps are getting upgrades as well, such as TestFlight and Swift Playgrounds.

The update -- available through the Mac App Store -- prevents audio from auto-playing on "most" websites, according to Apple. Users can also configure things like auto-play, content blockers, and Reader on a per-site basis, or make settings universal.
The browser also includes performance boosts, new controls for HTML audio and video, and better AutoFill accuracy when pulling data from Contacts.
macOS High Sierra is set to launch Sept. 25. In fact Safari 11 has long been available to people testing the beta and golden master versions of High Sierra, but until now getting it has required registering with Apple and installing potentially unstable code.
Other updates released today include Xcode 9, iOS 11 for iPhones, iPads, and iPods, tvOS 11 for the fourth-generation Apple TV, and watchOS 4 for the Apple Watch. Many first- and third-party mobile apps are getting upgrades as well, such as TestFlight and Swift Playgrounds.
Comments
Edit: I just downloaded 11.0 and tested it on a repeat-offender web site - cnn.com. Safari did an awesome job of not playing the videos! Hopefully it will do as good a job of stopping all the annoying video ads, too!
I'm betting it doesn't stop video from loading. Having no definitive information, I thought it stopped Auto-Play specifically, and took that to mean neither video or audio started.
I guess I'll know soon enough!
Safari 11 was not present under the Updates tab in the (Mac) App Store. But there was an update for the App Store. I downloaded that (v 2.2.1) and restarted according to instructions. Still no Safari 11 present under the Updates tab, or anywhere else in the App Store. Thank you.
A black window slid in view from the left, had a minus sign in the upper right corner, then slid out of view. I assume that would have been a video (?) but it didn't load. Does CNN use Flash?
Anyway, Safari 11 is a win even if it only just stopped auto-play.
It is in my Sierra App Store Updates as of 7:15PM. Go try again.
I've noticed since beta one that any device below iOS 11 or High Sierra cant see the Safari iCloud tabs of a device on iOS 11 or High Sierra... I submitted this issue twice during the beta cycle with the feedback app, but got no reply...