Apple’s security lockdowns are a common culprit for the "No MIDI Library Found" error. Starting with macOS Catalina (10.15), apps must request permission to see certain folders—including /Users/Shared where Toontrack stores MIDI files.
If your DAW or EZDrummer cannot see the Shared folder, it cannot see your grooves.
Solution: Grant Full Disk Access:
Alternative: Reset permissions on the Toontrack folder:
If you upgraded from EZdrummer 2, there might be a conflict with where the new version looks for files. ezdrummer 3 no midi library found
EZdrummer 3 actually comes with its own updated core library. If you previously pointed your old EZdrummer 2 installation to a custom folder, EZdrummer 3 might be looking at that old folder (which might not have the new EZD3 MIDI files).
The Solution: Make sure you have downloaded the EZdrummer 3 Core Library specifically. If you are trying to use your old EZD2 library with the new EZD3 plugin, you will be missing the new MIDI features. Apple’s security lockdowns are a common culprit for
EZdrummer 3 relies on the installed EZX expansions to populate the groove library. If your EZXs are installed but not authorized, the MIDI inside them won't show up.