I am Robert Root work as a software engineer at MacProTools 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, PDF, MBOX, CSV, EMLX, Gmail, Office 365, etc on Mac. You can download our OST to PST Exporter for Mac.