Press Command (⌘) + Shift (⇧) + 3 to capture the entire screen
Press Command (⌘) + Shift (⇧) + 4 to capture a selected area
Press Command (⌘) + Shift (⇧) + 4, then press Spacebar to capture a window
Press Command (⌘) + Shift (⇧) + 5 to open the screenshot toolbar
Press Control + Command (⌘) + Shift (⇧) + 3 to capture the entire screen to the clipboard
Press Control + Command (⌘) + Shift (⇧) + 4 to capture a selected area to the clipboard
Press Control + Command (⌘) + Shift (⇧) + 4, then press Spacebar to capture a window to the clipboard