This program also isn't on our website, only valid in Mac App Store. Only $6.99 to get it.
Movie2GIF is the best tool to convert the movie files to animated GIF.
It's easy to use, just drag a movie to Movie2GIF and select the clip, click 'Start', then a high quality animated GIF will be generated for you! You can set the output dimensions and frame rate and choose the default output directory.
Store link: https://itunes.apple.com/us/app/movie2gif/id558155421?mt=12