https://youtu.be/mbtaxLebh4c总结：绝大多数app适配了
触摸板和鼠标更新内容
Mouse and Trackpad Support
- All-new cursor design highlights app icons on the Home Screen and Dock and buttons and controls in apps
- Magic Keyboard for iPad support on iPad Pro 12.9-inch (3rd generation or later) and iPad Pro 11-inch (1st generation or later)
- Magic Mouse, Magic Mouse 2, Magic Trackpad, Magic Trackpad 2, and third-party Bluetooth and USB mouse support
- Multi-Touch gestures on Magic Keyboard for iPad and Magic Trackpad 2 enable you to scroll, swipe between app spaces, go Home, access App Switcher, zoom in or out, tap to click, secondary click (right-click), and swipe between pages
- Multi-Touch gestures on Magic Mouse 2 enable you to scroll, secondary click (right-click), and swipe between pages