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