Installing iMovie 10.2.5 file is a common workaround for users with older Macs—specifically those running macOS Catalina (10.15.7)
Double-click the .pkg file inside the mounted image.
Did you download the file from the or an external archive? imovie 1025 dmg install
If iMovie feels too restrictive, many users now lean toward for its massive library of social media templates, or jump to Final Cut Pro if they need a professional workspace.
A prompt will appear asking for confirmation. Click again. Step 4: Mount and Install Double-click the DMG file to mount it to your desktop. Installing iMovie 10
Because you are installing a software package from outside the official App Store, macOS Gatekeeper might block execution, throwing an error that says: "iMovie cannot be opened because it is from an unidentified developer." To bypass this safety protocol:
If you have a newer iMovie installed (e.g., version 10.3 or 10.4), . macOS will not overwrite a newer app with an older one via DMG. A prompt will appear asking for confirmation
This error often occurs if the file was corrupted during the download process or if Gatekeeper misinterprets the digital signature.
: Includes classic iMovie features like 4K video resolution export, green-screen chroma-keying, built-in trailers, and seamless transitions without the overhead of newer, heavier UI redesigns. Prerequisites Before Installation
DMG files are the standard way to distribute software outside of the Mac App Store. A DMG acts as a digital container, much like a virtual hard drive or DVD that you "mount" (open) on your desktop.