I am running Rails v4.0.2 on Mac OS 10.9.2 and I had everything smoothly. All of a sudden I'm getting an error saying gems are missing when I try rails server. I run bundle install and this is the output: Fetching gem metadata from https://rubygems.org/....... Fetching additional metadata from https://rubygems.org/.. Using rake 10.1.1 Using i18n 0.6.9 Using minitest 4.7.5 Using multi_json 1.9.0 Us