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How to Сonvert MKV to MP4 on Mac

Edited by Pat Bitton

July 30, 2020

MKV (which stands for Matroska) is a universal format used for storing multimedia content like movies, concert videos, and TV shows in HD. Although this format is getting more and more popular, it’s only supported by a limited number of devices.

Let’s have a look at solutions to other common problems related to MKV files.

Can’t open a video file?

Either your device doesn’t support the file’s format, or you need to install a special media player. In both cases, converting the file to a suitable format is the best solution.

Is your video distorted?

There can be a number of possible explanations. Most likely, however, the video file is just too large. Reducing its size in a conversion app might help.

Sound problems?

Usually, this is due to an incorrect audio codec used in the file. Change the codec using the right kind of software – like a dedicated video converter.

How to Convert MKV to MP4 Without Quality Loss on Mac

Unfortunately, users of Apple smartphones cannot open MKV files on their devices, and even Mac users can encounter difficulties opening and playing these videos. In these instances, you need to convert MKV to MP4 on Mac. The best way to do this is to use a dedicated program. Movavi Video Converter can help you transform your files extra quickly, thanks to its SuperSpeed mode.

What Is the SuperSpeed Mode?

The fastest way to convert MKV to MP4 on Mac is to transfer data from one container to another without compression. The SuperSpeed mode is a function in Movavi Video Converter that enables format changes in the blink of an eye without re-encoding or associated quality loss.

There are a few limitations though that you need to take into account when using SuperSpeed conversion:

  • Codecs, resolution, bitrate, and other video parameters need to remain unchanged.
  • Special effects cannot be applied: e.g., you cannot rotate your video or add watermarks.
  • With our software, you can easily change the format from MKV to MP4 on Mac. Movavi’s MKV lossless converter for Mac supports not only MKV and MP4 but many other video, audio, and image formats as well.

    Read our short guide and learn how to convert MKV to MP4 on Mac.

    Install Movavi’s Transcoder on Your Mac Device

    Download the installation file for Movavi Video Converter to your hard drive, open it, and install the program.

    Open Files for Conversion

    First, locate the files to convert: click Add Media in the upper left corner, select Add Video, and choose the videos. If you want to use SuperSpeed conversion, make sure that your MKV files are encoded either with the H.264 or MPEG-4 codec; otherwise, the SuperSpeed mode will not be available.

    Select the Output Format

    Open the Video tab, find the MP4 icon, and click on it; a list of MP4 presets will appear. Choose the one that best meets your needs. If you want your files to be converted extra quickly, select the preset with the SuperSpeed icon.

    Start MKV-to-MP4 Conversion

    By default, all converted files are stored in the Movavi Library folder. If you want to use a different folder, click Save to and locate the desired folder on your computer. Click the Convert button to start the process. Since the Movavi app supports one of the fastest video processing technologies, your files will be converted in no time.

    With Movavi Video Converter, converting MKV to MP4 on Mac is fast and lossless! The program also includes other features like cropping, rotating, and adding watermarks to your video. Download the software and check it all out!


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    The ideal way to get your media in the format you need!

    • Convert video, audio, DVDs, and image files
    • Enjoy lightning-fast conversion without quality loss
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    • Save video and audio clips for easy mobile access

    MP4 vs. MKV Comparison

    Let’s have a closer look at the differences between MP4 and MKV formats.

    MP4 (MPEG-4 Part 14) is a container format used for storing video and audio streams. Low loss of quality combined with high compression levels, as well as its compatibility with almost all default media players, makes the MP4 format one of the most widely used formats on the Internet. You can play MP4 files with any default media player.

    MKV (Matroska Multimedia Container) is a free, open-standard video container format. MKV files can contain an unlimited number of video, audio, and subtitle tracks in one file. That’s why this format is widely used for storing multimedia content such as movies and TV shows. Using this format, you can watch your favorite movies with any combination of audio tracks and subtitles. It’s less universal than MP4 because you need to install a special media player to open MKV files, and you can’t open these files on iPhones.

    Comparison parameterMP4MKV
    File extension.mp4.mkv
    Video-encoding formatsH.264, H.265, MPEG-2, MPEG-4, H.263, VC-1, Dirac, othersH.264, H.265, MPEG-4, MJPEG, Theora, VP9, DV, others
    Audio-encoding formatsAAC, MP3, AC-3, Apple Lossless, ALS, SLS, othersAAC, AC3, MP3, ALAC, Vorbis
    Device and OS compatibilityCompatible with almost all devices and operating systemsSome TVs, media players, and mobile devices. Windows PC (with a special codec installed), no native support in macOS

    To sum up, if you want to watch a movie with the audio track in your target language and English subtitles on a Windows PC, MKV is your best choice. In most other cases, MP4 is much more convenient.

    Frequently Asked Questions

    What Is the MKV Format Used For?

    MKV (which stands for Matroska Video) is a universal format designed as a new standard for high-quality video compression. MKV can combine HD video with multiple audio tracks and subtitle tracks – that’s why it is a good choice for storing movies, TV shows, and concerts.

    Can I Play MKV Files on a Mac?

    Unfortunately, Mac users may encounter difficulties when attempting to open MKV videos, and iPhones do not support MKV at all. To open MKV files on Apple hardware, you need to convert MKV to a more common format, for example, MP4. The best way to do this is to use a dedicated conversion program. Movavi Video Converter can help you transform your files fast, thanks to its SuperSpeed mode.

    Can MP4 Files Be Played on a Mac?

    Although Mac’s default player supports the MP4 video format natively, it can only play files compressed with MPEG-4, MPEG-2, and H.264 codecs. If you want to play an MP4 file encoded with a different codec, you’ll need to install a player that supports that codec, or convert the video clip to another format, like MOV.

    Is MKV Better Than MP4?

    Both MKV and MP4 are popular video formats that support H.264 video. However, Apple smartphones and Mac computers don’t support MKV natively, while MP4 is a default format for iPhone, iPad, and many other devices. So, if you want to transfer videos to your iPhone, it’s better to choose MP4, but if your device supports MKV, you can keep your files in this format.

    Will Converting MKV to MP4 Reduce the File Size?

    Yes, it will help to make the file smaller. MKV files are usually larger than MP4s because of some attributes like multiple tracks and subtitles. A smaller file size means quicker downloads as well as savings in storage space. So if you need your MKV video to be smaller, try converting it to the MP4 file format. If you’re worried about quality loss, use Movavi Video Converter – it enables you to change the format of your videos while retaining good quality.