Go with MacMister Mac OST to PST Converter Software to open OST files data to PST, PDF, EML, MSG, MBOX, DOC, HTML, vCard, ICS, Gmail, Office 365, Yahoo, IMAP, etc. It transfers all OST mailbox data like contacts, calendars, emails, notes, and other details without Outlook installation. Because of its simple to use interface, even home users can use this utility. The free trial pack of the program converts a few items from OST data.
Download for Free- OST Converter for Mac

If you face challenges in Importing VCF Files into PST for such situations I want to share that the MailsClick Address Book Manager Tool to bulk import VCF files into PST can be used to find an effective way to import VCF files into Outlook. It is an easy-to-use application that exports VCF files to Outlook files quickly and precisely. This application is ideal for converting entire VCF databases into PST and it works even if the VCF files are encrypted. It simply converts those encrypted VCF files into PST files without affecting the original VCF file. This is the best solution for technical and nontechnical users they can easily install this tool on Windows operating systems.

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