If you're encountering difficulties with the multi-output option for MPC 2 within Logic Pro, follow these steps to resolve the issue:

Step 1: Ensure the Latest Version of MPC is Installed

Make sure you have the most up-to-date version of MPC installed on your system. Updates often include critical bug fixes and improvements.

Step 2: Install MPC Drivers from MPC 2 Installer

Double-check that you've installed the MPC drivers using the MPC 2 installer. This step is essential for proper integration with Logic Pro.

Step 3: Open MPC as a Standalone DAW

Before using MPC 2 as an AU instrument in Logic Pro, try opening it as a standalone DAW first. This can sometimes help with compatibility.

Step 4: Open MPC 2 as an AU Instrument in Logic

1. Launch Logic Pro.

2. Create a Software Instrument track.

3. Choose "MPC" from the list of available plugins.

Step 5: Perform an Audio Unit Reset in Logic

If the issue persists:

1. Open Logic Pro.

2. Navigate to Preferences > Audio Units Manager.

3. Find the MPC plugin in the list.

4. Select it.

5. Click the "Reset and Rescan Selection" button.

Step 6: Remove the MPC Component from the Mac's Component Folder

If you're still not seeing MPC 2 as a multi-output option, we will have to reinstall MPC. Before reinstalling MPC, remove the MPC Plugin component from your Mac's component folder:

1. Open Finder.

2. Navigate to Macintosh HD (or your system drive) > Library > Audio > Plug-Ins > Components.

3. Locate the MPC Plugin component and move it to the Trash.

4. Empty the Trash to completely remove it from your system.

Step 7: Reinstall MPC

After removing the MPC Plugin component, proceed to uninstall and reinstall MPC. Sometimes, a fresh installation can resolve issues. After re-installation, please repeat steps 1-4.

Step 8: Downgrade Logic (if necessary)

As a last resort, if none of the above solutions work, consider downgrading to Logic Pro version 10.7.8 and performing a full AU wipe and reset. Some users have reported success with this method.