Instructions
Press "F13" if there is such a key on your keyboard. Go to the "World of Warcraft" folder on your computer. Find the screenshot in the "Screenshots" folder.
Pause the game using the "Escape" key if you do not have the "F13" button. Select "Options." Select the "Key Bindings" menu. Change the entry for the "Screen Shot" entry to the button of your choosing. Enter your game and press the assigned key. Go to the "World of Warcraft" folder on your computer. Find the screenshot in the "Screenshots" folder.
Press "Command" plus "Shift" and "3" during gameplay to take a screenshot using the Mac OS X screenshot function. Find the image on your desktop.