You can find a number of third-party tools online to convert Apple Mail to Outlook 2016, 2013, 2010. However, it is difficult to identify the one that matches your requirement and gives the best results effortlessly. Well, you can try Stellar Converter for MBOX that assures comparatively better results without putting much of an effort. It provides you with an easy-to-understand interface that anyone with or without the technical knowledge can use to convert Apple Mail to Outlook 2016, 2013, 2010, or Office 365. Try free demo version available here- https://www.stellarinfo.com/email-tools/mbox-to-pst-converter.php