You can easily recover Mac OST files using MacUncle OST Recover Tool. The tool supports Mac OS Machines.
Start MacUncle OST Recovery Tool 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.
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.