Need to download iMovie '09 on MacBook Pro 16" with iMovie 10
I found a tutorial on how to extract the older iMovie 09 onto the same Mac as v10 &amp; have both capable of running (I doubt it will work on Catalina or later, but I haven't tested)


Download the iMovie 9.0.9 package… https://support.apple.com/kb/DL1574?viewlocale=en_US&amp;locale=en_US

Create a folder on your Desktop called iMovie.

Open the imovie9.0.9update.dmg file to show imovie9.0.9update.pkg

Drag this .pkg to the folder.

In Terminal, type pkgutil --expand followed by a space, drag iMovie9.0.9Update.pkg to the Terminal window, and then drag the desktop iMovie folder to the Terminal window. Hit Backspace to remove the space, and then type iMovie so the full command is
pkgutil --expand /Volumes/iMovie\ 9.0.9/iMovie9.0.9Update.pkg Users/[username]/Desktop/iMovie/iMovie  

Hit Enter, and wait for the extraction to complete. Then quit Terminal.


So we have a new iMovie9.0.9Update.pkg file in the /Desktop/iMovie/iMovie/ folder.

Right click on it and select Show Package Content.
In the resulting folder, right click Payload and choose Get Info.
In the info panel, go to Name &amp; Extension field to add .zip extension.
Hit Enter and there will be a prompt. Click Add and we get Payload.zip.
Double click on Payload.zip which will generate a folder Payload 2.
Go into the Payload 2 folder, next Applications folder and Voila, the iMovie app is there!

Right click the iMovie and select Copy iMovie. Now open Finder and go to the Applications folder, right click on empty space and select Paste Item. Click Keep Both when prompts. To distinguish with the newer iMovie, it's better to rename it to iMovie 9.