I have done all kinds of research and tried many different things. I know this question has been answered many times, but none of the suggested solutions are working for me.
OS : Maverick 10.9.3
Ruby 1.9.3
WARNING: Nokogiri was built against LibXML version 2.9.1, but has dynamically loaded 2.9.0
My solution:
gem uninstall nokogiri
brew update
cd /usr/local
brew versions libxml2
git checkout 5dd45d7 /usr/local/Library/Formula/libxml2.rb # libxml version 2.9.0
brew install libxml2
bundle install or gem install nokogiri -v "1.5.11"
Hope this help