sudo port install beanstalkd
sudo port install memcached
 
sudo gem install beanstalk-client
sudo gem install memcache-client
 
# to start
beanstalkd -d
memcached -d
 
# if you get connection refused errors, make sure beanstalkd is running
ps aux | grep beanstalk | grep -v grep
 
# if you don't see it:
nohup beanstalkd > /dev/null &
 
# if you get the following error:
# /cores/ruby-enterprise/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- spec/test/unit (MissingSourceFile)
sudo gem install rspec-rails