If you want to import OST to Outlook, first you need to convert OST to PST. There is no option in Outlook for Mac or Windows to import OST data, but you can use PST for the same. Here is the tool from USL Software helps you to convert ost file to many other formats.
OST Extractor Pro is available for both Windows and Mac. It recover and convert ost data accurately. It assures you 100% recovery without any data loss. Get the free trial today!