You can easily convert Mac MBOX files to EML using MacUncle MBOX to EML Converter. The tool supports Mac OS Machines.
Start MacUncle MBOX to EML Converter on your Mac Computer.
Select MBOX file using Add File(s) or Add Folder(s).
Choose EML from saving formats.
You can also select the file naming option if required.
Press the Export button to start the conversion process.