Answer by anonymous for How can I make Vim paste from (and copy to) the system's clipboard?

If you are using vim in MAC OSX, unfortunately it comes with older verion, and not complied with clipboard options. Luckily, homebrew can easily solve this problem.

install vim:

brew install vim --with-lua --with-override-system-vim

install gui verion of vim:

brew install macvim --with-lua --with-override-system-vim

restart the terminal to take effect.

append the following line to ~/.vimrc
set clipboard=unnamed

now you can copy the line in vim with yy and paste it system-wide.