I have added a set of Mac OS X (PPC Darwin) files to the SourceForge download page at:
http://sourceforge.net/project/showfiles.php?group_id=65032&package_id=121936&release_id=392993
You will either need to copy dict.xml to /usr/local/share/mxflib or specify it on the commandline to each application.
mxfwrap and mxfdump allow this with the option -d=./dict.xml however this isn't available for mxfsplit. You can still get mxfsplit to work with the dictionary in the
current directory by loading it as an extra dictionary with option -dd=./dict.xml (just ignore the first error message when it can't find the main dictionary)
MXFSplit produces one file per essence stream in the MXF file, these get rather odd names (derived from the stream details) so you will want to rename them.
Hope this helps.