To solve this issue, you need to compile vim with +clipboard yourself. I suggest OSX users to use brew to help this process. Out-of-the-box brew compiles vim with +clipboard. To do this run
brew install vimThen you might need to create a new symbolic link from your vi command to point to the newly installed vim.
First you need to know the path of your new vim. Run
brew info vimYou should see something similar to /usr/local/Cellar/vim/7.3.875 in the result which means your vim binary file is at /usr/local/Cellar/vim/7.3.875/bin/vim. To create a new symbolic link for vi, first you need to remove the existing link
sudo rm /usr/bin/viThen you can create a new link.
sudo ln -s /usr/local/Cellar/vim/7.3.875/bin/vim /usr/bin/vi