[apple smith]

iMovie is a video editing software application which allows Mac users
to edit their own home movies. iMovie imports video footage to the Mac
using either the FireWire interface on most MiniDV format digital
video cameras, the USB port, or by importing the files from a hard
drive. From there, the user can edit the video clips, add titles, and
add music. Effects include basic color correction and video
enhancement tools, and transitions such as fade-in, fade-out, and
slides.

Before you can begin working in iMovie, you need to bring in some
video from a video recording device and store the video on your
computer (or an external hard disk). iMovie will also allow you to
import the following file formats:
DV (standard definition) and HDV (high definition), MPEG-2 and AVCHD
from Camcorders, MPEG-4, DV, and .MOV files stored in Mac. MKV to
iMovie Converter can import MKV to iMovie supported format such as mp4
for edit.

How to import MKV video files to apple imovie on Mac OS X with iMovie
Mac Video Converter?

http://www.4yousoft.com/imovie/mkv-to-imovie.htm

Step 1: Add MKV video files
Download, install and run MKV to iMovie Converter, then click "Add File
(s)" button on the toolbar, select you want to convert MKV files in
the dialog box that open.

Step 2: Select output format: "MPEG-4 Movie (*mp4)"

Step 3: Convert MKV file
Click "Convert Checked Item(s)" button on the toolbar to start
converting the files.

Step 4: Importing convertion mp4 files to imovie
Launch iMovie, go to "file import movies". Select the converted MP4
video then click "import".

http://www.4yousoft.com/imovie/mkv-to-imovie.htm