Many OST to PSTConverters for Mac tools is available on the internet. If you are confused about which one is the best tool then I suggest you first download the free version and check the tool. I would also like to share the best tool vMail OST to PST Converter Tool. The software maintains emails such as to, bcc, cc, subject, and attachment. It also supports all the latest versions of MS Outlook and Mac OS. Without any creating problem, you can operate the tool.