Install rbenv | moving from rvm to rbenv

gistfile1.txt

rvm implode
brew update
brew install rbenv
brew install ruby-build
rbenv init -
echo 'eval "$(rbenv init -)"' >> ~/.zshrc

rbenv install 1.9.3-p429
rbenv rehash

brew install rbenv-gemset
rbenv gemset create 1.9.3-p429 global
echo global > ~/.rbenv-gemsets
gem install bundler
rbenv rehash

cd my-project
echo "my-project-gemset global" > .rbenv-gemsets
bundle install
rbenv rehash

For more info + quick startup guide :  https://gist.github.com/MicahElliott/2407918