screen and tmux have a copy mode (this is "inside" of the terminal emulator, I'm not talking about using your mouse to select text in Terminal.app) that allow y

screen and tmux have a copy mode (this is "inside" of the terminal emulator, I'm not talking about using your mouse to select text in Terminal.app) that allow you to copy text. I assume he wants copy there to yank the text to the OS X clipboard. It's possible in tmux, but kind of annoying (the best solution I've found requires another key combo press to push your copy into the system clipboard).