Thanks for writing in. My name is Naval and I am an Independent Advisor. I would like to help you.
Unfortunately, right now there is no specific plan in to enable personal vault through OneDrive App on the MacOS.
Please refer this Microsoft article for reference : https://support.office.com/en-us/article/which-...?
Hope this information helps. Please post if you need any further assistance.
Regards,
Have a nice day