Preparation: Free download Video Converter for Mac, install and launch it.

Step 1: Load MKV files- Drag & drop MKV video files to the program. Or go to "File" menu, choose "Add Video" to locate the mkv files you want to add.

If you want to save time and energy, you can apply batch conversion by adding several files at one time., and play the MKV files for previewing with the built-in player. Certainly, you can also take a snapshot while preview.

Step 2: Set the output format - Select "iMovie" from output format list, the preset is the optimized settings for iMovie. And the output video can be imported to iMovie 11/iMovie 09/iMovie 08/iMovie HD on the Mac running Mac OS X Snow Leopard, Lion etc.

Note: Certain MKV files have multiple sound tracks and subtitles, select one you preferred.

Step 3: (Optional) Basic editing before import mkv files to iMovie.
Do some video editing like Split video segment, Cut off the black sides, adjust video effect, apply watermark or join input file together.

Step 4: Convert- Click "Convert" button to convert MKV files rapidly and the output file is ready for being imported to iMovie.

Step 5: Import MKV to iMovie freely- Launch iMovie, from the File menu, choose Import > movies, navigate to the folder that output iMovie videos are saved. Select the files and click "Import" to add the converted MKV to iMovie for further editings.

Almost the same working flow when you convert MKV to QuickTime, FCP, iTunes Library, iPad, iPhone, iPod Touch, Apple TV. Just free download MKV to iMovie Converter for Mac Lion, it will solve all your video converting problems.