Before installing, ensure your Mac can natively run iMovie 10.3.3.
Do not search for a "New DMG" on the web. Instead, use the . This ensures you get a legitimate, safe copy of version 10.3.3 (or the last version your macOS supports) directly from Apple's servers.
Before downloading and installing the package, ensure your Mac meets the necessary hardware and software prerequisites to avoid installation errors. macOS 11.5.1 (Big Sur) or later. imovie 1033 dmg new
Right-click the newly unpacked internal package inside the directory and select .
: Double-click the imovie1033.dmg file to open it. Before installing, ensure your Mac can natively run
If you are installing iMovie 10.3.3 on a Mac that previously had an older version of iMovie (iMovie 9 or earlier), the app may prompt you to "Update Projects and Events" from the File menu to convert them to the iMovie 10 library format.
: Maintenance updates like 10.3.3 primarily address bugs such as app "not responding" issues, which are often caused by incompatible versions or large cache files. This ensures you get a legitimate, safe copy of version 10
Sort of. You can create a custom project aspect ratio (9:16). However, the magnetic timeline is not optimized for vertical—text titles may clip. For heavy vertical editing, consider CapCut or DaVinci Resolve.
Requires macOS 11.5.1 or later (though 12.3 was recommended for full feature support).
Here are some tips to help you get the most out of iMovie 10.3.3:
As of 2026, iMovie 10.3.3 is now five years old. Apple has moved on to iMovie 10.6 and is rumored to be integrating AI storyboarding. However, the community of users clinging to is substantial: