iMovie 2 for Mac OS X: Unable to Import Some JPEG and GIF Images

JPEG and GIF files without file types cannot be imported into iMovie for Mac OS X. Some images may be available in the Import dialog, some are dimmed. These images can be opened in other applications, like Preview.
Symptom

Some JPEG and GIF files cannot be imported into iMovie. Some images are available in the Import dialog, some are dimmed. iMovie 2 for Mac OS 9 can import the images.

Solution

If Preview can open the files, you can use Preview to export the images for use with iMovie. Follow these steps:

You can also use a third-party utility to manually add file type/creator codes to the affected file(s).
Published Date: Feb 18, 2012