Release Notes for Safari Technology Preview 12Safari Technology Preview Release 12 is now available for download for both macOS Sierra betas and OS X El Capitan. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers WebKit revisions 204289–204876. This release of Safari Technology Preview will be the last that will install and run on OS X El Capitan 10.11.4 and 10.11.
