You can easily eliminate duplicate EML files using MacUncle EML Duplicate Remover. The tool supports Mac OS Machines.
Launch MacUncle EML Duplicate Remover on your Mac Computer.
Add EML file(s) or folder(s) using Add File(s) or Add Folder(s).
Choose the desired files from the list using the check box. Press the Next button.
Now, set Selective Duplication Settings, Search type, Destination location, and Date Range.
Press the Export button to start processing the EML files and delete duplicates.