You can log into your OneDrive account through any modern web browser (Edge, Firefox, Chrome, Safari), where you can:
If you navigate to the official OneDrive download page on a modern browser, you will be presented with the OneDrive .pkg installer. If you attempt to install this on macOS 10.13.6, you will likely see an error message: "This version of macOS is too old."
While Microsoft no longer provides an official public download link for this legacy package, community forums suggest you can attempt to locate installers with specific build numbers, such as the widely referenced 21.203.1107.0004 or the "Deferred Ring" build 20.114.0607.0002 from 2020. onedrive for macos 10.13.6
Simply stop using the desktop app. Access onedrive.live.com via Firefox (which still supports High Sierra with an Extended Support Release) or Chrome (last supported version for High Sierra is Chrome 116).
OneDrive servers constantly rotate their security certificates. While version 22.218 has built-in root certificates from 2022, those expire. Eventually, the server will present a certificate signed by a root that your High Sierra no longer trusts. When this happens, sync will fail with a "SSL/TLS error." You can log into your OneDrive account through
CPU usage while idling is low (~0–2%). Initial sync of ~50 GB took ~3 hours over 100 Mbps, which is acceptable for a 2017-era OS.
This removes write permissions for the updater, preventing it from ever running again. Access onedrive
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.
: If your hardware supports it, upgrading to macOS 11.0 (Big Sur) or newer is the only way to regain full official support and security updates.
If your Mac is running macOS 10.13.6, you're good to go!