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 in version 1.5.3
Updated on Oct 25 2022
Bug fixes:
Fixed a crash when saving documents with extremely large timestamps. (It was unlikely to encounter them in normal circumstances, but other apps could generate them by mistake.)
On El Capitan (10.11.6) I get a "could not make a connection" driver warning on every launch, but it only affects the ability to "spy" on other MIDI apps, not the ability to monitor MIDI messages on input and output ports. Other than that, it's worked fine for me; can't complain for the price!
another great one !!!!
thanxx Kurt for this great little tool !!!
with SysEx Librarian together ....what do you need more to handle your MIDI stuff .....