OS X comes with a pretty hung ruby (1.8.7) until ‘Mavericks’. ruby 1.8.7 had it’s planned EOL long ago, even debian/stable nowadays comes with a newer one.
So if you’re still running Mountain Lion or older, you may need to install ruby.
I chose rbenv and here’s how I did:
- RTFM
- install rbenv:
$ brew install rbenv ruby-build - add :
$ brew install rbenv ruby-build - patch
.bashrc - do a
$ rbenv rehash - purge all previously installed gems:
$ gem list | cut -d ' ' -f 1 | xargs sudo gem uninstall - restart terminal
- install a ruby of choice, and happily
bundle installever after