Safari Technology Preview for Mac OS X Released, Aimed at Developers
Apple has released a new developer focused version of Safari, called Safari Technology Preview. The new browser is aimed at more advanced Mac users who want to “get a sneak peak at upcoming web technologies in OS X and iOS” and test those experimental technologies on websites, web applications, and with Safari extensions and plug-ins.
The Safari Technology Preview installs as a separate version of the Safari browser, distinct with a purple icon, and runs as an entirely separate application. This makes Safari Technology Preview a lot like Google Chrome Canary, and it means there isn’t any risk in downloading and running the Safari Tech Preview build alongside the regular Safari browser. Users can even choose to have the tech preview set as their default web browser on the Mac if desired, though that is likely only beneficial to web developers and those in related industries.
The first version of Safari TP arrives as a dmg with a simple package installer, and requires OS X 10.11.4 or later to be installed on the Mac.
Updates to the Safari Tech Preview app will arrive on the Mac via the Mac App Store. Because the app is separate from Safari, there is no additional software necessary to use the build, and there is no enrollment in a beta testing program. You can find both apps side by side in the /Applications/ folder after it has been installed.
The first build of Safari Technology Preview includes the following release notes:
– ECMAScript 6 support including lexical scoping, iterators, generators, arrow functions, default parameter values and many new built-in APIs
– Better standards compliant IndexedDB support with more stability
– Added the ability to use document.execCommand(‘copy’) and document.execCommand(‘cut’) in response to a user gesture to copy and cut text programmatically
– The latest implementation of the Shadow DOM specification
– Added support for Content Security Policy Level 2
Web Inspector Changes
– Included many web compatibility fixes and bug fixes
Preliminary testing of Safari Tech Preview suggest the first build is fast, and quite stable without any obvious problems or major issues, perhaps making it usable as a daily web browser for those who are comfortable with the idea of running what is essentially developer centric software. It remains to be seen if the new Safari Tech Preview is impacted by the same freezing issue that impacts some users with Safari in OS X 10.11.4.
Aside from the purple icon, the Safari Tech Preview browser looks identical to the normal Safari browser:
Users can install plugins and extensions in Safari Tech Preview without impacting the normal Safari browser, and vice versa. The regular Safari.app and Safari Tech Preview app also contain their own caches, cookies, and history.