If you must run OneDrive on this specific OS version, here is how to set it up:
Document ID: MS-OD-HS-1013
Date: April 2026
Target OS: macOS 10.13.6 (High Sierra)
Status: End of Support (EoS) onedrive for macos 10.13.6
Fix: This happens when the legacy client attempts to connect to a SharePoint site with Conditional Access policies. Switch to a personal Microsoft account or ask your IT admin to bypass CA for legacy devices (not recommended for security). If you must run OneDrive on this specific
Use Mountain Duck or CloudMounter. These apps connect to OneDrive’s WebDAV or Graph API without requiring the official Microsoft sync engine. As of May 2026, both still support macOS 10.13. These apps connect to OneDrive’s WebDAV or Graph
Fix: The legacy sync engine has a known memory leak. Go to OneDrive Preferences > Network and limit upload/download bandwidth to 500 KB/s. Also, ensure you have no folders with tens of thousands of small files (code repositories, node_modules).