You can easily Extract Mac MBOX files using MacUncle MBOX Extractor. The tool supports Mac OS Machines.
Start MacUncle MBOX Extractor on your Mac Computer.
Select MBOX file using Add File(s) or Add Folder(s).
Choose saving format as EML from the option.
You can also select the File Naming Option and Choose Destination path if required.
MBOX File Extraction process completed successfully, you can see the message of completion.