: Continued use may lead to sync errors or data loss, as no further security patches or updates are provided. Where to Download

: Available via MacUpdate for older macOS versions (OS X 10.6+). Key Features HTC Sync Manager - HTC SUPPORT | HTC Middle East - HTC

: Sites like Softpedia and TechSpot host archived versions (e.g., v3.1.88.3) for Windows XP through Windows 10.