I downloaded two gem files: Sass-3.3.7.gem & compass-0.12.6.gem
I ran gem install --local Sass-3.3.7.gem which it installe
Install Sass 3.2.19:
sudo gem install sass -v 3.2.19
I didn't need Sass 3.3.7, and Jekyll keep finding the latest version installed, so I got uninstalled Sass 3.3.7:
sudo gem uninstall sass
Sass doesn't seem to overwrite previous versions, so I still had 3.3.2 installed (if there are multiple versions installed it gives you a choice of what version you'd like to uninstall), so I uninstalled that as well.