You can easily convert Mac OST files using MacUncle OST to PDF Converter. The tool supports Mac OS Machines.
Start MacUncle OST to PDF Converter on your Mac Computer.
Select OST file using Add File(s) or Add Folder(s).
Choose saving format as PDF.
You can also select the File Naming Option and Choose Destination path if required.
Mac OST to PDF conversion process completed successfully, you can see the message of completion.