Logic Pro supports USB or MIDI versions of the JLCooper MCS3 control surface. Both USB and MIDI versions are installed automatically when you open Logic Pro. If your MCS3 is not recognized and installed correctly, follow the steps below.
Ensure that your MCS3 USB device is correctly connected to the computer with a USB cable. Also ensure that the unit is powered.
Open Logic Pro, and the MCS3 will be added to the Control Surfaces Setup window.
Make sure that your MCS3 units are connected to the computer via MIDI.
Choose Logic Pro > Preferences > Control Surfaces > Setup.
Choose Install in the Setup window’s New menu.
Select the MCS3 from the list in the Install window.
Click the Scan button.