If you're experiencing problems using the Logic integration for either the Launchpad range, the Launchkey MK3 range or the SL MkIII range you may find the below steps a useful piece of troubleshooting as they reset Logic's Control Surface preferences in a way the user cannot.
- Turn off the SL MkIII
- Exit Logic Pro X
- Open Finder
- Press Shift + CMD + G
- Navigate to ~/Library/Preferences/
- Delete the file 'com.apple.logic.pro.cs'
- Restart Logic Pro X
- Turn on the SL Mk III
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