screencapture is used to capture an image of the whole, or part of the screen.

#Takes a screenshot of the entire screen and saves it to the file screencap.png in the cwd
screencapture screencap.png

Where to install

screencapture comes built with OSX’s command-line tools. If you don’t have them, you can install them via:

xcode-select --install


screencapture [options] [file] 


Here are some cool flags that you could use within your program.

[-t format]


#screencapture will save the file as a jpg instead of png (default)
screencapture -t jpg screencap.jpg

[-R x,y,w,h]


#screencapture will capture a 500x500 rectange with (250,600) as the upper left hand corner
screencapture -R 250,600,500,500 screencap.jpg

[-T seconds]


#Take the picture after a delay of 10 seconds
screencapture -T 10

Below are some other cool flags and their descriptions, try them out!

Flag Description
-c Force screen capture to go to the clipboard.
-C Capture the cursor as well as the screen. Only allowed in non-interactive modes.
-d Display errors to the user graphically.
-i Capture screen interactively, by selection or window.
-m Only capture the main monitor, undefined if -i is set.
-M Open the taken picture in a new Mail message.
-o In window capture mode, do not capture the shadow of the window.
-P Open the taken picture in a Preview window.
-s Open the taken picture in a new Mail message.
-x Do not play sounds.
-help Display help