I can tell you that exiftool is not the cause of this problem. On OS X, installing exiftool does not install any executable code -- it uses the existing Perl executable on your system. So you have some other problem, probably a corrupted disk.

But to remove exiftool, type "open /bin" in a Terminal window, then from in the "bin" folder, drag "exiftool" and the "lib" folder to your trash and empty the trash.

- Phil