How to install ssmtp on 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.

If Homebrew already has a formula for it (in /usr/local/Library/Formula), and you have the exact archive that the formula expects (i.e. same file name and same contents, as determined by SHA1 or whatever hash type the formula uses), you can put the archive in ~/Library/Caches/Homebrew and then try brew install formula_name (substituting the correct name for formula_name, of course).