Step 1: Download, install and open the VLC Player app on your Mac. Click Media > Convert/Save. Step 2: From the Open Media window, click on the + button from the File tab to import MKV files from your computer. Once the files are added, click on the Convert/Save button. Step 3: A new Convert pop-up window will open. Step 1. Launch VideoProc Converter AI and click Video Converter on the main screen. Step 2. Click +Video on the top of the interface to load the video files you intend to convert. You can also simply drag and drop your WebM, MP4, MKV, AVI, and MOV videos there (420+ formats supported). Step 3. button. Step 2. Click the "Open media" button to import your AVI files. And then click the "Customize" button to choose MKV format under the "Encapsulation" tab and click "Apply". Step 3. Click the "Save as File" button to convert and save your MKV files. Download MKPlayer, install and launch it on your Mac computer. Step 3. Drag and drop the MKV file to this player to play. Note: The Safari extension also allows you to directly open MKV videos found on websites. You can turn this player into a Mini player to play MKV files on Mac while doing other tasks on the desktop. Here’s how: Open the VLC media player and click Tools > Preferences. Click All at the bottom left corner. Click on the Input / Codecs tab, click Video codecs, and choose Demuxers > Matroska. Deselect Preload MKV files in the same directory on the right side, and click Save. The output video formats it supports are even fewer than VLC, and you can only choose from MP4, MKV, and WebM. Although HandBrake has no advantage in respect of the supported formats, it's famous for compressing the output MP4 videos. HandBrake is so powerful since it encodes MP4 files with the H.264 codec, and this feature leads to its If you have VLC Media Player installed on your computer, you can try VLC to compress your large MKV video movies size. Look at its main compression ability and follow the guide to reduce video file size with VLC. Compress MKV video file size by downscaling (lowering down video resolution). Convert and compress MKV videos to MP4 H.264 format. uilov.