M365 OneDrive (How To) - OneDrive Sync for Mac
The OneDrive sync user is available for those who prefer managing their files using a desktop application over a web browser. To use the desktop sync user, you must install it and sync your library. Once synced, your OneDrive for Business library will appear as a folder on your computer from which you can view, upload, and share.
Sync files with OneDrive on Mac OS X- This article provides instructions for installing and setting up OneDrive on a Mac computer.