Even if the DMG mounts and installs, the software is a relic. Modern codecs (like H.265) will choke the older engine. The "deep" irony here is that the users seeking this file are often split into two camps:
Seamlessly handles projects initiated on iOS devices.
: Runs on both Intel-based and Apple Silicon (M1/M2/M3) Macs.
Once you have secured the iMovie10.3.3.dmg file, follow these steps:
If you have a fresh Mac or have never hit "Get" on iMovie with your personal Apple ID before, your purchase history will be blank. Find a friend or colleague running a newer Mac model.