Hey users, if you’re looking for the best tool to convert OST to PST on macOS, then I recommend you utilize the MacMister Mac OST to PST Converter that is the best application to export your limitless OST files into PST format at once. This app permits you to move all your calendars, contacts, emails, notes, journals and more items to PST file format without difficulty. Its highly suggested by most IT experts. With this utility, you can transfer OST files of any size; there is no size restriction.