There are two primary ways to obtain iMovie 10.1.12: the official Apple method (highly recommended) and legacy archives. Method 1: The Mac App Store "Purchased" Trick (Recommended)
If available, download the .dmg file directly from Apple’s secure servers.
Click on your in the bottom-left corner to view your account page. Scroll through your list of Purchased apps to find iMovie. imovie 10.1.12 download
If you want, I can:
If you downloaded iMovie as a .dmg (Disk Image) file, follow these steps to install it: There are two primary ways to obtain iMovie 10
. If your OS is older, the App Store should offer to download the "last compatible version" for your specific system. Apple Support Community Troubleshooting Download Obstacles
Once you've downloaded iMovie 10.1.12, follow these steps to install it: Scroll through your list of Purchased apps to find iMovie
If you have an external SSD, you can install macOS Mojave on that drive. Reboot your Mac holding the Option key, boot into Mojave from the external drive, log into the App Store, and download version 10.1.12 to that drive.
iMovie 10.1.12 was optimized for specific macOS releases. It runs natively and most stably on: macOS 10.14 Mojave macOS 10.15 Catalina