10.2.5 Dmg [patched] — Imovie

A: No. iMovie 10.3 libraries are not backward compatible. You would need to export your 10.3 project as an XML (not possible) or as a final video file, then re-import into 10.2.5 as clips.

For specific version archiving, third-party sites like FileHippo host the 10.2.5 installer. Note: Always scan third-party DMGs for security before opening. imovie 10.2.5 dmg