You can now open a picture in third-party apps like Adobe Photoshop and Pixelmator directly from Photos.Your edits save automatically as you go back-and-forth between apps. This means as new devices let you capture more HD and 4K videos, the quality of that video will be preserved better without taking as much room on your device. High Sierra supports what Apple calls high efficiency video coding ( HEVC) aka H.265 for videos.

So if you buy a pink patent leather collar for your dog on one site, you won't see ads for the same collar on other sites. Safari has a new feature called Intelligent Tracking Prevention which uses machine learning to find advertisers that track you and remove the tracking data they leave behind. Now all of your old Messages will be available on your new Mac. High Sierra changes this by using iCloud to store your message history. Unless you are restoring from a backup, your Messages app is essentially a blank slate. Setting up a new Mac can be a mix of fun and tediousness. Long Exposure adds a DSLR-like effect for motion blur and Bounce lets you edit the action in your Live photos to play it forward and backward in a loop. Loop is Apple's answer to a GIF and lets you edit Live photos for the perfect repetitive loop. The Mac's native Photos app got a number of new features including the ability to edit Live photos with three new effects: Loop, Bounce and Long Exposure. Live photos still won't be GIFs, but High Sierra will help you make them act like one. For example, you can turn off autoplay videos for a site, but still let the site have access to your location and set a default page zoom level of your choosing. Specifically, Safari enables you to customize controls, settings and preferences for individual websites. Safari got a number of improvements, but the standout feature is the ability to block autoplay videos. Apple even announced ARkit, a new platform for developers to create augmented reality experiences for iOS devices. The new OS will support more powerful Mac hardware aimed at creative professionals, especially those creating VR and AR content.

Apple finally gets into the virtual reality (VR) and augmented reality (AR) game with High Sierra.

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