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MIDI Monitor is a utility for Mac OS X which displays MIDI signals in a variety of formats. It can watch both incoming and outgoing MIDI streams, and can filter them by message type and channel.

What's New

Version 1.3.1:
  • MIDI Monitor now auto-saves documents and automatically restores them on launch, like modern OS X apps do.
  • Fixed a bug causing "Untitled" documents to appear when they shouldn't have.
  • Don't warn when opening a document whose sources are not currently present. It's more annoying than helpful.
  • Show more details in the "data" line for sysex events. In "expert more...


  • OS X 10.7 or later
  • MIDI hardware interface with OS X driver

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Current Version (1.x)


Downloads 13,088
Version Downloads 216
License Free
Date 22 Aug 2014
Platform Intel 64 / OS X
Price Free
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