You can easily convert Mac OST files using MacUncle OST to PST Converter. The tool supports Mac OS Machines.
Start MacUncle OST to PST Converter on your Mac Computer.
Select OST file using Add File(s) or Add Folder(s).
Choose saving format from PST, EML, EMLX, MSG, HTML, MHT, CSV, PDF, etc.
Create separate PST files for each OST File
You can also select the File Naming Option and Choose Destination path if required.
Mac OST conversion process completed successfully, you can see the message of completion.