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.
Last Updated: May 2026 Target Keyword: iMovie 1025 dmg upd imovie 1025 dmg upd
| Feature | iMovie 10.2.5 | iMovie 10.4+ | |---------|---------------|--------------| | | Mojave/Catalina | Big Sur (11) or newer | | 32-bit plugin support | Yes (last version) | No | | iDVD / iWeb integration | Yes | Removed | | Classic themes (Bulletin Board, Filmstrip) | Yes | Deprecated | | Performance on 2012-2015 Macs | Optimized | Noticeably slower | Right-click (or Control-click) iMovie
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. Problem 2: “This Update Requires macOS 10