: Click the "Install" or cloud icon. A prompt will appear stating the current version is incompatible, but it will offer to "Download the last compatible version" . Confirm : Click "Download" to begin the installation. Troubleshooting and Alternatives
Last updated for macOS Sierra 10.12.6. Apple may eventually remove legacy downloads from the App Store CDN. Download iMovie as soon as possible while Apple still hosts the compatibility version. Download Imovie For Mac 10.12 6
: Click the Apple icon at the top-left of your screen and select Go to Your Account : Click on your name or the tab at the bottom or top of the sidebar. Locate iMovie : Find iMovie in your list of previously downloaded apps. Click Download : Click the cloud icon or "Install." Confirm Older Version : Click the "Install" or cloud icon
Open Disk Utility → Run First Aid on your startup disk. Then delete iMovie preferences: ~/Library/Preferences/com.apple.iMovieApp.plist : Click the Apple icon at the top-left
If iMovie does not appear in your "Purchased" history, or if you have never downloaded it before, standard App Store searches will likely fail with a "macOS version required" error.