In OS X, you can use the system’s Audio MIDI 
 Setup options to coordinate an external MIDI device with a list of patch 
 names (or instruments) that match the factory settings on your external 
 MIDI device. After you do this, you can simply choose the device in the ScoreManager and the appropriate instrument names will appear in the Sound column. This list of patches is held in a .MIDNAM 
 file which may be included with the external MIDI device, or found online. 
 (For example, http://digicake.com/midnams is one site that houses 
 midnam files for a variety of MIDI devices.)
        
        
            - Quit all applications.
- Create a new folder in the "MIDI Devices" 
 folder found on your Hard Drive > Library > Audio > 
 MIDI Devices.
- Rename the folder so it is named the same name 
 as the device’s manufacturer. For example, if you have a Yamaha 
 device, name the folder "Yamaha".
- Place your ".middev" file as well 
 as your ".midnam" file in that folder.
- Open the Audio MIDI Setup (Hard Drive > 
 Applications > Utilities) and click on MIDI.
- If you previously created and connected an 
 external device in the MIDI Setup window, highlight it and choose Remove.
- Click Add External Device.
- Connect the In and Out of that new external 
 device to your MIDI interface ports.
- Double click on the new external device to 
 get the "Device Info" window.
- If your ".middev" and ".midnam" 
 files are correct and correctly installed, you should be able to choose 
 the manufacturer of your device as well as the model.
- Close the Audio MIDI Setup.
- Go to MIDI/Audio > Device Setup >
 MIDI/Internal Speaker Setup. Choose the name of the device you just created. Click OK.
- Go to the Window > 
 ScoreManager .
- The device's sounds are now available under the Sound column.