Mac OSX Screen Capture

You never really think about capturing an image of the screen or part of it until you actually have to do it. With Windows it was simple since there is a button in most cases on the keyboard to do this. With Mac OSX it is also easy you just need to know the shortcuts.

All files saved by default to the Desktop as .PNG files otherwise they are stored in the clipboard

Capture the entire desktop
Command-Shift-3

Copy the entire desktop (to the clipboard)
Command-Control-Shift-3

Capture a portion of the desktop
Command-Shift-4
Control-Command-Shift-4 (capture to clipboard)
(Drag the cross-hair cursor that appears around the area you wish to capture)

Capture a specific application window
Command-Shift-4, then Spacebar
Control-Command-Shift-4, then Spacebar (capture to clipboard)

Using the bundled Mac OS X Grab Utility
Applications > Utilities > Grab
(Useful if you need to include a cursor or a menu in your screen shot, or if you want to save your screen shot to TIFF format)

Include a cursor
Go to Grab Preferences and select the cursor icon you wish to have in your screen shot.
Capture Types from Capture Menu (or keyboard shortcut):

• Selection (Shift-Command-A) [Cursor not included in capture]
• Window (Shift-Command-W)
  
• Screen (Command-Z)
  
• Timed Screen (Shift-Command-Z) [An instruction window will appear that allows you to prepare your screen for capture. When ready, press the "Start Timer" button and you will have ten seconds before the screen is captured. This allows you to open menus and sub-menus, if necessary]