Click the Launchpad icon in the Dock, or pinch closed with your thumb and three fingers on your trackpad. Then click an app to open it. You can also type an app's name to find the app in Launchpad, then press the Return key to open it.
you can simply click on 'application' in the sidebar to open your default application folder, which contain for each app on your system.you can double click any of the icons in here to open them or take you to do it if currently open.
