I'm not a Mac user but I often get asked to nominate a good (preferably free) MIDI player for Macs. Ideally it should (in terms of priority):
- Allow you to vary playback speed
- Alter the playback volume by channel
- Change the instrument for each channel
- (Ideally) Let you change the playback key (pitch)
- Save any modofoed .mis file
I note that you provided a heap of links above, but do have a personal favourite MIDI player for Macs?