Mail Passport Lite is the solution for all your migration related to MBOX and EML. It helps you in importing MBOX to Outlook 2016 / 2013 / 2011 / 2010 / 2007 / 2003 & Office 365. Though it is supported by window Os but converted PST file can be used for both Mac and Window Outlook. It is a 2 in 1 email converter and also convert EML along with MBOX to desired PST file format. An easy to use tool with free trial version which allows you to convert 10 files per folder so one can experience migration before hand.
For more details: http://www.mailpassportlite.com