He opened the folder and double-clicked the app.

If you are looking for a DMG to bypass App Store requirements, be aware that official support only exists through the following methods: Need older version of iMovie - Apple Support Community

untrusted torrent sites or forums that bundle software with custom download managers, as these often contain adware or malware.

It includes built-in trailers, themes, and high-end filters that make amateur footage look significantly more polished. Limitations

Step 5: Bypassing "Unknown Developer" Warnings (If Applicable)

Are you using an processor or an Apple Silicon (M-series) chip?

Drag the iMovie icon into your Applications folder .

What can you do?

Now that you've installed iMovie 10.3.3, it's time to start editing your videos. Here's a beginner's guide to get you started:

Corrects a known issue where audio volume sliders could intermittently reset during editing sessions. Understanding the DMG File Format