Once you have the installer (an .app file or .pkg ), follow these steps to avoid permission errors.
If you’re still running on your Mac, you’ve likely discovered a common frustration: the modern version of iMovie from the App Store requires a newer operating system. Download Imovie For El Capitan 10.11 6
Before iMovie was free on the App Store, it was sold as part of the suite (iLife '11). If you can find an original iLife installation DVD: Once you have the installer (an
A prompt will appear stating the current version is incompatible but offering to . Accept this to receive iMovie 10.1.6 . How to get iMovie on macOS Catalina on version 10.15.7? If you can find an original iLife installation
Go back to your El Capitan Mac, follow the "Purchased" tab steps above, and you will now have the option to download the older compatible version. 3. Alternative Official Downloads (iMovie 9.0.9)
If you cannot use the App Store method, Apple provides a standalone update for on their Support Downloads page. Download iMovie for El Capitan - Apple Support Community