Rather than risking a system infection for a legacy version of iMovie, users have safer paths: The Mac App Store "Purchased" Tab
: Torrents are notorious for bundling malware, keyloggers, or miners. Installing an application from an unverified source grants that software deep permissions on your system. Stability Issues Apple iMovie 10.1.9 Torrent
are free, open-source, and run on older versions of macOS without the security risks of a torrent. Web-Based Editors Rather than risking a system infection for a