Please make sure that your VoiceLive 3 has all its Midi Information Set Correctly. Midi MODE = USB Sysex ID=0 Midi In Filter = None Midi Out Filter = None Input Channel = 1 (Should be ok with other values) Output Channel = 1 (Should be ok with other values)
If after the above, its still does not operate; make sure that no other applications are Grabbing the VoiceLive 3 Midi Data.
Try another USB Cable if still not working.
Finally if still not working, I have created an OSX MIDI FAQ, which may help also.
Editors for :- VoiceLive 3/Extreme, VoiceLive 2, VoiceLive Touch, VoiceLive Touch2, VoiceLive Play GTX, Perform VK. https://www.voiceliveeditor.com