One: the keyboard command:
push Command (apple)+shift+3 at the same time to take a picture of your entire screen
Push command(apple)+shift+4 and your cursor will turn into a cross, and you can choose what part of your screen to take a capture of.
These will be saved to your desktop.
Go to Applications>Utilities>Grab or from finder/your empty desktop’s menubar Go> Utilities>Grab. Then from grab’s “Capture” menu, choose what type of capture you want to make. A window will popup with the image. When you try to close this window, it will ask if you want to save the capture.
Three: screencapture command
From Terminal (applications>utilities>Terminal) type the following:
screecapture -S ~/desktop/name_of_capture.jpeg
to capture your whole screen and save it to the desktop. Alternatively, type
screencapture -i ~/desktop/name_of_capture.jpeg
to get the crosshairs and select part of your screen.
~/desktop/name_of_capture.jpegto a different location on your computer, e.g.
screencapture -icwill save the capture to your clipboard, and then you can paste it into an editor of your choice
man screencapturefor more options,
qto get back to your terminal prompt.