I\'ve been banging my head against the wall for the better part of an hour trying to figure out what\'s going wrong here, and I\'m sure (or rather hoping) it\'s something fa
I was having a very similar problem on OS X 10.6.7 running Ruby 1.9.2p180.
To expand on Ash Berlin's comment, if you are using the homebrew package manager, you need to uninstall the imagemagick package and also remove the cache as well, before it will work.
Uninstall imagemagick:
brew remove imagemagick
Delete the cache:
rm -rf `brew --cache imagemagick`
Then re-install the package with this flag:
brew install -f imagemagick --disable-openmp