: Open the App Store, click "Updates" in the sidebar, and select "Update" next to iMovie. Manual DMG Install :
iMovie 10.2.5 is frequently the "last compatible version" offered to users who cannot upgrade to the newest macOS. imovie 1025 dmg upd
Websites offering direct downloads or changelogs. : Open the App Store, click "Updates" in
After updating to 10.2.5, iMovie crashes… - Apple Community : Open the App Store