[Gimp-user] midi-control gimp 2.8 on mac os x

["leonard worker com" <leonard worker com>]

as far as i understand, controlling gimp via midi-devices (keyboards etc.) seems to be possible only on linux.
but this is such a great feature !!!
does anybody have the same problem / any idea how to fix this for mac os x / know what the exact obstacle is 
for the midi-signal to reach gimp in mac os x ?