How do you upgrade iMovie without buying iLife?

To upgrade iMovie without purchasing iLife, you can download the latest version directly from the Mac App Store. Ensure that your macOS is compatible with the latest iMovie version, as updates are often tied to system requirements. Simply open the App Store, search for iMovie, and click the "Update" button if an update is available. If you don't see an update option, it may mean your version is already up to date.