Here is the comprehensive solution:
brew cask install emacs
xattr -rd com.apple.quarantine /Applications/Emacs.app/
mkdir ~/projects/prde/; cd ~/projects/prde/
git clone https://github.com/prde/prde-emacs-config.git
ln -s ~/projects/prde/prde-emacs-config ~/.emacs.d
Then you can run your Emacs application - it is already pre-configured for you.
Configuration is originated from "Clojure-friendly emacs config" here: https://github.com/flyingmachine/emacs-for-clojure
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