If your Library was created in iMovie 10.3 or later, version 1025 cannot read it. The database structure changed after macOS Big Sur.
A new window will appear showing the iMovie application icon. imovie 1025 dmg
A prompt will appear stating: "The current version requires macOS [X] or later, but you can download the last compatible version." If your Library was created in iMovie 10
In educational environments (such as international schools) or enterprise settings, IT administrators often archive stable legacy versions of software to maintain compatibility across older lab computers. imovie 1025 dmg
iMovie 10.4.3 (the latest version as of early 2026) remains the premier free entry-level video editor for macOS, though it has seen few major functional updates since 2023. It is highly regarded by reviewers for its simplicity clean interface