Hey guys. I found this info on taking a screen shot with a mac. hope it helps someone
1. Hold down the APPLE [Command] and SHIFT keys
2. Press 3 for a screen shot of the entire screen
3. Press 4 to get a "Crosshairs" so you can select just a section of the screen you want a screenshot for.
4. Press the space bar after you press 4 if you want it to automatically size the screenshot so that it perfectly matches the window it's over. After you press the space bar, a camera icon should come up.
5. Know that the resulting file will be placed on your desktop, named Picture X.pdf for versions of 10.3 or earlier and Picture X.png for 10.4 and later (could also end in .jpg).
* Press Esc to cancel.
Complete List of Keyboard Shortcuts
Images Saved as Files to Desktop
* Command-Shift-Option-8: Screenshot of full screen placed as file on desktop. Saves it to the desktop
* Command-Shift-Space Bar-4, then drag and drop mouse over selected area: Screenshot of selected area as file on desktop.
* Command-Shift-4, then space, then click a window: Screenshot of selected window placed as file on desktop.