The regular method to download iMovie on Mac is to purchase it on Mac App Store. Add it to the shopping cart and then you can get the latest version of iMovie. Step 1 Open the App Store on your Mac and enter 'imovie' in the search box to find the iMovie app.iMovie is an excellent program to edit video clips for Mac or iOS systems. In order to download iMovie for free, you might have to jailbreak..