This program will not recursively go through a directory to provide an MD5 hash for all the files within a directory.

If you want to be able to provide a directory for a program to comb through and provide MD5 hashes, you can use the standard OS X command line as described here:

http://blog.ambor.com/2009/01/recursively-md5-multiple-files-in-os-x.html

The benefit of the command line approach is that you can also specify which files to MD5 (e.g. find all the MP3 files and provide me with a single text file that contains all of the MD5 hashes).