Hi. My indie movie is on iMovie. I imported in as large, rather than full HD since I have a Mac Mini. It is an hour and 25 minutes, and I used an external hard drive to store my footages. And I didn't install any additional softwares on my Mac. However! Now that I open iMovie, it freezes after it loads up all of my editing. It loads up the footages, the sound effects, the music, and so on. When it's done loading up, I try modify anything (meaning if I even click on something) in the time-line... it freezes and stays that way until I need to force quit it. With all my editing done, all I need is to work on the adding a few sound effects, music, and two voice overs ... but it has halted since iMovie has done this to me. PLEASE. HELP ME. What is wrong? How can I fix it?