Standaloneupdaterdaemon

[Start] → Sleep (scheduled) → Check manifest → │ ├─ No update → back to sleep │ └─ Update available → Download → Verify → │ ├─ Fail → Retry (exponential backoff) → after max retries, alert & sleep │ └─ OK → Backup current → Apply new → Health check → │ ├─ Health OK → Commit → Notify success → Sleep │ └─ Health fail → Rollback → Notify failure → Backoff & retry later

The primary role of StandaloneUpdaterDaemon is to handle . Unlike major OS releases, which are bundled and scheduled, standalone updates often include firmware patches, Gatekeeper security data, and XProtect malware definitions. By running as a daemon—a program that operates in the background without user intervention—it can monitor Apple's update servers and fetch vital data even when the computer is idle or the user is not actively checking for updates. Architecture and Operation standaloneupdaterdaemon

have OneDrive installed, it could be a sign of suspicious activity. Apple Support Community Management and Removal Disabling: You can toggle it off in System Settings > General > Login Items [Start] → Sleep (scheduled) → Check manifest →