Screenshots
You can snap a picture of the entire screen, a window, or just a portion of the screen. By default, all screenshots will be saved to your desktop for easy access.
Full Screen
Press and hold to take a screenshot of your entire screen.
Partial Screen
Press and hold to take a screenshot of just a portion of your screen. This will turn your cursor into crosshairs.
Drag the crosshair to select the area of the screen to capture.
To take the screenshot, release your mouse or trackpad button.
Window or Menu
Press and hold to take a screenshot of a window or a menu. The pointer changes to a camera icon.
Click the window or menu to capture it. To exclude the window's shadow from the screenshot, press and hold the Option key while you click.