The most useful keyboard shortcut all Mac owners should know is Cmd+Space, which opens the Spotlight window, but the following are useful when the Spotlight window is already open:
Option (held down): Shows the location of the currently selected item as text at the bottom of the right of the Spotlight window.
Cmd+R or Cmd+Enter: Reveals the currently highlighted Spotlight result’s location. Files will be revealed in Finder windows but contacts, emails or other results will be opened for viewing in the default apps.
Cmd+L: Jump to the dictionary definition in the search results (if there is one).
Cmd+I: Open the file info dialog box for the current result, if it’s a file, folder or application.
Cmd+B: Search for the term in the default browser, using whatever search engine is selected as default too.
Cmd+Backspace/Cmd+full stop (period): Instantly clear the Spotlight search field.
Cmdl+Z: Undo, as in any other app, but useful if you reuse the Spotlight window without closing it because it can not only undo typing but can also restore to a previous search.
Mac keyboard shortcuts your should know