Newbe Dev Stack

Answer : You just need to change directories to your app, THEN run bundle install :) You may also indicate the path to the gemfile in the same command e.g. BUNDLE_GEMFILE="MyProject/Gemfile.ios" bundle install I had this problem as well on an OSX machine. I discovered that rails was not installed... which surprised me as I thought OSX always came with Rails. To install rails sudo gem install rails to install jekyll I also needed sudo sudo gem install jekyll bundler cd ~/Sites jekyll new <foldername> cd <foldername> OR cd !$ (that is magic ;) bundle install bundle exec jekyll serve Then in your browser just go to http://127.0.0.1:4000/ and it really should be running

Answer : Open the Gemfile and change first line from this source 'https://www.rubygems.org' to this source 'http://www.rubygems.org' remove the ' s ' from ' https '. As @Wasif mentioned, first make sure the Ruby Gems site is up and your network access is ok. If they works fine, try it like this: First, delete your Gemfile.lock file Then run gem update --system Then in your Gemfile try changing the first line source 'https://rubygems.org' to http:// (without an s ) Unless there is a problem with your connectivity this should fix the issue with bundle install .