spawn ENOENT error

I'm trying to upload stuff to amazon s3 with the imager module. I keep getting the error message that says,

events.js:72
    throw er; // Unhandled 'error' event
              ^
Error: spawn ENOENT
    at errnoException (child_process.js:980:11)
    at Process.ChildProcess._handle.onexit (child_process.js:771:34)

I've already installed imagemagick on my computer, but it keeps saying it's unlinked, could this be the problem? I also tried linking using brew link imagemagick, but it's unable to link for some reason. I'm using OSx. Any fixes?

Thanks.