Mac - Screen capture

Command +Shift+3 
It captures entire screen and saves it in the desktop.

Command +Shift+4 
Use the mouse to select a specific area of the screen for capture saves it in the desktop, press ESC to dismiss.



Cmd+Ctrl+Shift 3
It captures the screenshot and keep it in clipboard


Cmd+Ctrl+Shift 4
It captures the selected screenshot and keep it in clipboard