There's a good deal of setup required, which includes setting up two-factor authentication through the security page of the Mac's system settings, and making sure your Apple Watch has a passcode set. If you own an Apple Watch, it can be used as a form of authentication to unlock a Mac, as long as your Mac is running MacOS and your watch is running WatchOS 3, and both devices are signed into the same Apple ID. Most HTML5 videos should work as well - and with Flash video on the run, that list should get longer in the near future. Among the first round sites where you can try this are ESPN and Vimeo. That way, you can watch while surfing other websites or doing other work. On select websites, videos can be popped out of their in-line spaces and instead play in a small pop-out video window off to the side of the screen. This is a small new feature, but a potentially very useful one. (But text and photo messaging will still work to your Android friends.) Watch more video with picture-in-picture To use the new features, including invisible ink, you need both MacOS on your computer and iOS 10 on your phone. Are bigger emojis on the Mac desktop version of Messages a real game-changer? Perhaps not, but Messages remains one of the smoothest phone-to-computer crossover messaging systems.
