I am Robert Root work as a software engineer at MacSonik Software. We develop premium products for Mac users and we also offer a wide range of DIY Commercial, Shareware, and Freeware Utility Software that helps Businesses, Enterprises, and SMEs to Migrate, Backup, and Convert Data on a Mac Operating System. We have a great tool to convert OST files to PST. You can download our OST to PST Converter.