While "LibreOffice 6.3.6" may still be available for download on various third-party mirror sites, it is for general use today:
: For a secure and optimized experience on Mac, users should visit the official LibreOffice website to download the latest stable version rather than searching for the outdated 6.3.6 release. LibreOffice-6-3-6-for-Mac-Free-Download--Latest-Version-
: Intel-based Mac (requires Rosetta 2 for modern Apple Silicon Macs). Memory : At least 512MB RAM (2GB recommended). Storage : Approx. 800MB available disk space. 5. Recommendation & Security While "LibreOffice 6