SysEx Librarian is a utility for Mac OS X which lets you communicate with MIDI devices using System Exclusive messages, also known as SysEx. The most common use is to backup patch data from synthesizers, although there are other uses (such as sending firmware updates).
SysEx Librarian makes it easy to keep a library of the SysEx files you use most often, and to record new SysEx files.
This review was originally posted on VersionTracker.com. This is a great app! Simple, easy to use, straightforward, and it does what it's supposed to do. I use it to upload my archived sounds to my Korg Prophecy, and it works like a charm. Stable and reliable. Thanks for making it free!