For a reliable migration of EML documents into PST is to use a third-party tool like Mac EML to PST Converter. It lets you export a couple of EML files into PST the use of the Batch mode. The software is capable to convert unlimited files without any data loss. It is so advanced software which couple export a couple of EML email messages and their corresponding attachments. The software supports all version of MS Outlook and Mac OS.
For more inforamtion: toolscrunch.com/mac-eml-to-pst-converter.html