How to install gnu sc on the mac

Here is the procedure I recommend, for those who are comfortable with the command-line and with Homebrew:

Install Homebrew.

Run the following on the command line (in Terminal):

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

Edit your shell startup files to ensure that /usr/local/bin comes first in your $PATH.

If you use vim as $VISUAL or $EDITOR, add `export VISUAL='mvim -f' to your environment (details).

Check that you installed everything correctly by running

brew doctor

Now, you can run the graphical MacVim on a file by running mvim foo.txt from the command-line. Or, you can run the text-based editor by running vim foo.txt. Also, if other programs (e.g., git) fork off a separate editor, they'll run the graphical MacVim.

See also How to run mvim (MacVim) from Terminal? and Set macvim as default application after homebrew installation.

The command line tools aren't offered via Xcode 5.0.1, but I was able to install them via this terminal command.

xcode-select --install

It will prompt you that it needs the command line tools and will offer to install them. Worked like a charm for me.