You can easily import Mac EML to Outlook files using MacUncle EML to MBOX Converter. The tool supports Mac OS Machines.
Start MacUncle EML to MBOX Converter on your Mac Computer and select EML file using Add File(s) or Add Folder(s).
Check uploaded EML file from the software panel and click on the Next button.
Choose the MBOX format from Select Saving Option.
Click the Checkbox if separate MBOX is required and Choose the Destination location.
The Conversion of Mac EML to MBOX completed successfully, you can see the message of completion.