For Better Apple Watch Integration
Do you own a recent Mac and the Apple Watch? If so, macOS Catalina takes things to another level.
You can now double click the side-button on your Apple Watch to authenticate on your Mac. You can use this to unlock a note, approve an installation, view passwords and more without entering a password on your Mac.
This is a cool way to build the Apple Watch into the Mac more, and it joins the ability to unlock your Mac automatically with the watch.