4Shortcut to hide apps instantly
⌘+H: Use this shortcut if you don’t want something you are looking at or working on to be seen by your boss, your family or someone passing by. This will hide the active window immediately. You can open it with the dock to see the app again.
Press ⌘+Option, and all running applications will be hidden.
If you do ⌘+M, the application is not hidden but minimized. Its preview will still appear on the right.
Shortcut to quickly switch between active apps
⌘+Tab: This shortcut opens the App Switcher window, and you can switch between active apps by pressing Tab.