Sometimes it is useful to run Emacs in a plain terminal window, even when a graphical display is available, but it’s a nuisance if you need to copy and paste from the text-mode Emacs to another program. This is a tiny minor mode which lets Emacs on Mac OS X use the system clipboard
even when running in a text terminal, via the external pbpaste and
pbcopy programs.
To enable it, either customize the variable osx-clipboard-mode to t, or
add the following line to your init file:
(osx-clipboard-mode +1)
Attempting to enable this mode an a non-OS-X system or in a graphical Emacs will do nothing, so it should be safe to enable it unconditionally even if you share your configuration between multiple machines.