You could have downloaded MidiKit 4.9 for Mac from our application library for free. Our antivirus scan shows that this Mac download is malware free. This software for Mac OS X is a product of Mixage. MidiKit for Mac is included in Audio & Video Tools.
From the developer:
MidiKit is a MIDI file browser/editor and batch processor. The browser quickly displays the most significant information about MIDI files. The editor allows native SMF editing with unlimited undo/redo capacity. Finally, MidiKit allows you to apply several operations on your MIDI files by batch processing entire disks at a time.
You may want to check out more software for Mac, such as Norrkross Movie, Xmart Volume or Aiseesoft iPhone Ringtone Maker for Mac, which might be similar to MidiKit.