On your phone end you will need to set it to data transfure rather than internet, if that is even possible (I did hook you up with the manual so if it is possible itr should tell you in that)
You are out of luck for USB as mac is not supported at all unless there is some 3rd party Mac version of the samsung software (I'm not going to look myself)
Your best bet if all else fails is to get a friend to blue tooth you some tunes from there phone