Dent du Midi
is a drag-and-drop application that takes standard MIDI files and generates AIFF containers for each track which contains note data. These AIFF container files are suitable for dropping into Apple's GarageBand application for use as loops or entire tracks. In simple terms, this application allows you to convert MIDI files into GarageBand files.
The name is a bit of a play on words. Dent du Midi is a 10,686 foot (3257 meter) mountain in the southwest of Switzerland in the west Alps. The name is French and is pronounced something like "don doo midi" which I thought sounded like "don't do MIDI" which is why I thought it would be an appropriate name since GarageBand doesn't import MIDI files.