Did you download the file from the or an external archive?
iMovie 10.2.5 DMG Install Guide: Getting the Best Version for Your Older Mac
Locate the downloaded file (usually named something like iMovie_10.2.5.dmg ) in your folder. Double-click the .dmg file. imovie 1025 dmg install
A system dialogue box will track the copying progress. This takes 1 to 3 minutes depending on your storage drive read/write velocities. Step 4: Unmount the DMG Archive
Locate the notification regarding iMovie and click . Provide your system administrator password when prompted. "The application is damaged and can’t be opened" Did you download the file from the or an external archive
Scroll through your history (this works if you have ever downloaded iMovie in the past on any Apple device). Find iMovie and click the Download (Cloud) icon.
: Ensure the source is reputable, as third-party DMGs can carry security risks. Some educational repositories like ICS Software maintain these for students. Open the DMG : Double-click the downloaded file to mount it as a virtual disk on your desktop. Drag to Applications : Drag the iMovie icon into your Applications Security Bypass (If needed) A system dialogue box will track the copying progress
Navigate to (or System Preferences) > Privacy & Security . Scroll down to the Security section. Click Open Anyway next to the prompt warning about iMovie. Provide your administrator password to confirm. Sourcing DMG Files Safely