Your using a new mac so I'm assuming you don't have a floppy drive, if you do, copy the file you want to load onto the floppy and load it in the mpc. If you can't do that then you can sample the file by plugging in some 1/4 inch cables from the digi 001 otuput(or waht ever soundcard your using to route audio through) into the mpc record in jacks.