The error here is: ld: file not found: /usr/local/lib/gcc/x86_64-apple-darwin13.3.0/4.9.1/ libgfortran.3.dylib
This sounds like you have an old version of gcc installed and need to update. Try running `brew update`, and then install Julia again. Additionally, the `--64-bit` flag doesn't do anything anymore, so you don't need to use it. -E
