My PX-300 has worked in the past, with my Mac. I have an iMac Pro now, which may or may not need setup steps in Utilities>Audio MIDI Setup. I have a duplicate of the same cable I always used before AND a different USB-MIDI cable. The Casio MIDI OUT to the MIDI cable IN. I hear electrical pops/clicks when I depress or release the keyboard keys (with no onboard volume), but Garageband will not play any sounds from my playing the CASIO. I have no idea whether something went kaput in the CASIO or if there are other settings I have yet to get right. On page E-23 of the PX-300 manual, I've done all the CONTROL functions and tested them in every configuration, but still nothing. PLEASE HELP! CASIO Support is NO HELP!
