Is there an alternative command to use to taking screenshots in iMAC (OSX10.9) ?

⌘⇧3 (whole screen) and ⌘⇧4 (select the region, or tap spacebar to select a window) have been used for a very long time.

What keyboard combination are you using?

Paul

Those the right keystroke commands, what problem are you having that is causing you to ask your question?????