: Click the Create New (+) button and select Movie to start from scratch.
: Check the file size. Legitimate iMovie 10.2.5 DMG should be approximately 3.2–3.4 GB . If smaller, redownload. Also verify checksum if provided by source. imovie 10.2.5 dmg
. Apple no longer provides iMovie 10.2.5 on the App Store for Catalina. Instead, the App Store offers the latest compatible version for your OS—but if you previously purchased it, you might need the DMG for reinstalls. : Click the Create New (+) button and
Run a virtualized copy of macOS Mojave via VMware or Parallels on your newer Mac. Inside the VM, download iMovie 10.2.5 from the App Store (if you previously purchased it). Then copy the app out to your host macOS—though it still won’t run natively on a newer OS. If smaller, redownload
Optimized for both Intel and Apple Silicon (M1) processors.
Introduced an Auto-Shrink option in the Inspector's Text Layout tab, which automatically adjusts text size to fit within paragraph, scroll, or crawl layouts.