When trying to run ImageMagick via node-imagemagick on my Grunt task, i get this error from ImageMagick:
Warning: Command failed: identify: unable to load
I came across this issue too when upgrading from Mt.Lion to Mavericks. I found an issue in homebrew's github repo. The fix that worked for me was:
$ brew uninstall imagemagick $ brew install imagemagick --build-from-source