- Install brew
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"answer the current user’s password and install is automatically
- Install ispell
brew install ispell --with-lang-en - Configure the .emacs
(setq ispell-program-name "/usr/local/bin/ispell") - Use M-x ispell to call it
Reference: http://unix.stackexchange.com/questions/38916/how-do-i-configure-emacs-to-use-ispell-on-mac-os-x