If your Mac is a 2012 or later model, you can use to install macOS Catalina (10.15) or Big Sur (11) on unsupported hardware.
Microsoft has drawn a line in the sand. While the legacy client will still upload and download simple files for now, it is on life support. The authentication servers are changing, the API endpoints are being deprecated, and an error message is lurking around every corner. onedrive for macos 10.13.6
This means you cannot download or install the current version of OneDrive on this operating system. While some features like or Known Folder Move were released for newer macOS versions, they are generally not available for 10.13.6. ⚠️ Current Status for 10.13.6 If your Mac is a 2012 or later
If possible, update your Mac to macOS 10.14 (Mojave) or newer to receive security updates and the modern OneDrive sync engine. Use macOS 10.13.6 only in isolated, offline-friendly environments. The authentication servers are changing, the API endpoints