Update Preview App Mac
You can update Safari Technology Preview right from the Mac App Store. Updates occur every few weeks and include the most recent version of WebKit. Access powerful developer tools. Use the latest version of the powerful Web Inspector and Responsive Design Mode to. Mac App Store is the simplest way to find and download apps for your Mac. To download apps from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Mac App Store is the simplest way to find and download apps for your Mac. To download apps from the Mac App Store, you need a Mac with OS X 10.6.6 or later.
Preview is part of the OS, so you'd have to use recovery to reinstall the entire OS - it will not erase your files; however, it is always best to have a backup first.
Can you check two things: open Activity Monitor (in Applications > Utilities) and if Preview is running, kill the process. And, go to your user library > Preferences and find these:
com.apple.Preview.LSSharedFileList.plist
com.apple.Preview.plist
com.apple.Preview.SandboxedPersistentURLs.LSSharedFileList.plist
Move them to the trash (do not empty yet). Restart Mac and see if the problem persists. The prefs files will be regenerating themselves. If something does not, simply move them back from the trash.
Apr 29, 2017 8:18 PM
Safari is the best way to see the sites on iPhone, iPad, and Mac. Safari Technology Preview gives you an early look at upcoming web technologies in macOS and iOS. Get the latest layout technologies, visual effects, developer tools, and more, so you can provide input on how they are implemented and deliver a best-in-class user experience on all Apple devices.
Preview the latest web technologies. Get a preview of the latest advances in Safari web technologies, including HTML, JavaScript, and CSS. Safari Technology Preview includes the most recent version of WebKit, the rendering engine that powers Safari.
Easy to update. You can update Safari Technology Preview right from the Mac App Store. Updates occur every few weeks and include the most recent version of WebKit.
Access powerful developer tools. Use the latest version of the powerful Web Inspector and Responsive Design Mode to modify, debug, and optimize your websites.
Download Preview For Mac
Provide feedback. Use Feedback Assistant to send feedback directly to Apple about issues and enhancement requests. Simply select Report an Issue from the Help menu in Safari Technology Preview.
Update Office Apps In Mac
Run side-by-side with Safari. Safari Technology Preview is a standalone app that works side-by-side with the current version of Safari, so you can continue to use and reference the current release.
Preview For Mac
Surf seamlessly with iCloud. Safari Technology Preview works with iCloud, so you can access your latest Safari Favorites, bookmarks, and Reading List.
Keep current. The WebKit blog keeps you up-to-date on the latest developments in HTML, JavaScript, and CSS.