Never download iMovie DMG files from unknown websites, no matter how well they rank on Google. Always verify the code signature, and when in doubt, use the App Store – even if it means upgrading your macOS.
Right-click (or Control-click) iMovie.app and select Open . Then click Open in the dialog that appears. This adds the app to your approved list. Problem 2: “This Update Requires macOS 10.15 or Later” Cause: You’re trying to install iMovie 10.2.5 on an older OS like macOS High Sierra (10.13) or earlier. imovie 1025 dmg upd
Last Updated: May 2026 Target Keyword: iMovie 1025 dmg upd Never download iMovie DMG files from unknown websites,