Hidden iMovie Files
Sometimes the Mac can be too clever for its own good. iMovie has a hidden directory structure for movies and somehow a movie I made is chewing up 50GB of disk, but you can't see it. Discussions.apple.com tells us that iMovie keeps its files in something called a pacakge. This is a collection of files that Finder and Spotlight only see as one file.
You need to download WhatSize to figure out what is actually on the disk since packages are hidden.
To then take them apart, you that need to find the movies which have the extension .iMovieProject and then you can see whats there by right clicking on the name and then choose Show Package Contents to find the Media folder with all the clips.
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