One really easy solution is to simply email the file as an attachment to an email address (formerly Hotmail and Windows Live Mail). You can download MSG Viewer for Outlook on Mac either directly from the developer or from the Mac App Store. You can see a full comparison between the free and paid version below. The free version only converts selected parts of MSG files – you need to upgrade to the full version for $18.99 to get full conversion of messages and batch processing.
Once installed, MSG Viewer opens your emails in a basic Outlook style interface which feels like using Microsoft Outlook on your Mac.
MSG Viewer for Outlook supports batch processing of files and conversion of Outlook MSG contacts in VCF format. MSG Viewer is a simple but effective app which can instantly open Outlook messages on a Mac.