You will see a notification stating “iMovie was blocked from use because it is not from an identified developer.”
Before diving into the installation process, it’s crucial to understand what this specific version offers. was released by Apple in mid-2018. It sits in a sweet spot of stability and features. Unlike newer versions (10.3.x and 10.4.x) which introduced heavy integration with Metal graphics and 360° video, version 10.2.5 focuses on:
Open your Downloads folder and double-click iMovie_10.2.5.dmg .
Because Apple primarily distributes software through the App Store, finding standalone DMG files requires caution. imovie 1025 dmg install
Drag the iMovie.app icon directly onto the Applications folder icon. This copies the application to your computer.
As of early 2026, the latest iMovie version is 10.4.4, which includes further refinements and performance boosts. If your Mac and workflow don't require iMovie 10.2.5 specifically, using the latest version from the App Store is always the recommended path for the best experience and security.
Version 10.2.5 is highly sought after by users running macOS 10.156 (Catalina) or macOS 11 (Big Sur) who cannot upgrade to macOS 12 (Monterey), macOS 13 (Ventura), or later. You will see a notification stating “iMovie was
Apple iMovie remains one of the most popular video editing applications for macOS due to its intuitive interface and powerful features. However, users running older macOS versions often face compatibility hurdles when trying to download the latest version from the Mac App Store. For many, finding and installing the specific iMovie 10.2.5 DMG file is the only way to restore video editing capabilities on legacy hardware.
Open the Mac App Store and click your name or profile in the bottom-left corner.
Double-click the .dmg file to open it. A new window will appear showing the iMovie icon or a .pkg installer. Unlike newer versions (10
If macOS blocks the install because it’s from an "unidentified developer," go to System Preferences > Security & Privacy > General and click Open Anyway . System Requirements for 10.2.5
Released by Apple as a stable update, iMovie 10.2.5 introduced critical performance enhancements, stability improvements, and optimization for Apple Silicon (M1/M2) chips.
: Complete the standard installation wizard to move the app into your Applications folder.