Wheres my options for Movie textures?

Hi there.

First of all, I work on a Mac. How come I can't use my video?

As you can see in my "Project window", I have a file called 'Comp_1' (MP4) and a file called 'Movies' (AVI). When I press either one of them, they won't show any options in the Inspector. If I try to press the preview button, Unity freezes but plays the videos audio.

I have the script needed attached to a plane and the movie texture attached, but still nothing is working.

What to do?