Our website provided a free download of FreeMIDI 1.4 for Mac. The software belongs to Audio & Video Tools. This free Mac app is an intellectual property of Mark of the Unicorn, Inc.
From the developer:
FreeMIDI is a complete MIDI operating system for the Mac. Its parts include a FreeMIDI system extension, an optional OMS (Open Music System) emulator extension (to emulate the Opcode MIDI System), and a FreeMIDI folder that resides in the top level of the System folder.
You may want to check out more software for Mac, such as CherryPicker, which might be related to FreeMIDI.