The best way to convert an OST file to a PST file format is to use the very safe solution with MailVita OST to PST Converter for Mac Software; it will be the ultimate solution to convert OST to PST format. It is a fast, safe, and user-friendly application that lets you convert OST files to a format that can be used on both Mac and Windows. It also does the conversion while preserving the integrity of all the data, including calendars, attachments, and emails. The tool’s user-friendly interface makes it easy to use even for non-techies, making it a dependable solution to prevent data loss.
More information: https://www.mailvita.com/ost-to-pst-converter-for-mac/