System Files iMovie 10 & 8.0.6 Garage Band 10 & 5.1
So I did the test with iMovie 10

It shows following files associated with it:



Since Apple changed iMovie &amp; Garageband significantly, it does not automatically uninstall the older version because there are still some people who want to stick with the older one. If you tried and liked the new one, you can simply put the older version in trash.