The best way to convert OST file to PST format is with the MacProTools Mac OST to PST Converter software. This solution is made to satisfy every user need, including the ability to convert Outlook OST files with ease. With its user-friendly graphical user interface and interoperability with all Mac Windows operating systems, it does not require any technical knowledge. Additionally, a free demo version that lets users convert a small number of OST elements to PST files is available for customers to test out its features. Additionally, all versions of Mac and Windows are seamlessly supported.