If you're switching from Apple Mail to Windows Outlook and looking for a solution to convert MBOX to PST format, you can try an easy manual trick. It requires no 3rd party paid tool or any other cost. You can simply export email messages from Apple Mail to Windows Outlook. Though the manual procedure is quire lengthy, but still you should try it. Refer to this blog post for complete information - http://wordpress.semnaitik.com/2014/05/24/convert-mbox-to-pst-manually/

Before you can use any 3rd party tool, you must try the manual trick shared in the blog post. Hope the shared information would be helpful here.

Thanks and best regards.