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How to Free Convert MKV to MP4 on Mac?

Free converting MKV to MP4 on Mac does not simply mean changing the file extension from .mkv to .mp4 on Mac. However, it should stretch to making the MKV files playable on Mac, PC, iPhone, iPad, Android, and so on. To that end, we will introduce 5 free MKV to MP4 converters for Mac to help you free convert MKV videos to MP4 format on Mac or remux MKV to MP4 on Mac without changing anything.

MKV to MP4 Converter Mac Download Free

WinX Video Converter for Mac is a professional and powerful video converter to let you convert MKV to MP4 video format on Mac while keeping the original audio video quality. Then, you can play the output MP4 video on Mac, iPhone, iPad, Android, etc. at one go.

Part 1. Why Do We Need to Convert MKV to MP4 on Mac?

MKV, the Martroska Multimedia Container is one of the free, open standard video containers. Though we can see many MKV-encapsulated video files in our daily life, the MKV file format has some shortcomings compared to the universal container – MP4. MKV file format does not fit the industry standard and lacks software and hardware supports on Mac platforms natively, so you will hardly play MKV on Mac or edit the video format on Mac.

Besides the compatibility issue, the flaws the MKV container format has is surely restricting its performance: No lossy or lossless profile of videos.

According to the facts, you will need a Mac MKV to MP4 video converter to convert MKV files to the more compatible format – MP4 to play, share, edit, upload, etc. without restrictions.

Part 2. Top 5 Free MKV to MP4 Converters for Mac

No.1: WinX HD Video Converter for Mac

* It is available for remuxing and converting MKV to MP4 on Mac for free.

WinX HD Video Converter for Mac is one of the best video converters for Mac that supplies full convert options & solutions on MAC. It supports all different MAC profiles and operating systems, effectively resolving the issue that limited video formats are supported by Apple's MAC OS. All different video containers, including MKV, WMV, AVI, FLV, WMV, etc., can be converted to MP4 or Mac-supported formats easily.

When focusing on converting MKV to MP4 on Mac, WinX HD Video Converter for Mac allows you to convert HD/4K MKV videos to MP4 format totally free to play on Mac, iPhone, iPad, Samsung Galaxy, Kindle Fire HD, PSP, and so on. Also, the Blu-ray MKV videos can be converted by this tool with a 15-20x real-time converting speed. If needed, you can have some simple video editing like cut, crop, add subtitles, etc., and change the video parameters like resolution, fps, and bit rate.

WinX HD Video Converter for Mac

How to free convert MKV to MP4 on Mac with WinX HD Video Converter for Mac?

Step 1. Free download WinX HD Video Converter for Mac, install and run it on your Mac computer.

Step 2. Add your MKV source file from Mac. This free Mac video converter supports batch conversion mode, so you can upload many files needed to be converted one by one by dragging or clicking "+" button. You are even able to merge the MKV videos to be an entire one.

Step 3. Choose MP4 as the output format. You are advised to find "AVC HD Video (H264)" in HD Video option under "Common Video Profile" which will deliver higher video quality with .mp4 extension if you want to get the best quality video.

Step 4. Optionally, you can change the parameter settings to get the best quality. There are three things you are suggested to do:

  • Adjust the output quality to "HQ" on the interface of the Output profile window, the conversion time of which will be longer;
  • Check "Use High Quality Engine" on the right for better image effect;
  • Set the value of Bitrate in settings to be higher. You can keep VBR, or choose to CBR and increase the value.

Step 5. Hit "RUN" button and begin the free MKV to MP4 video conversion on your Mac.

No.2: VLC

* A free and open-source media player with video conversion ability.

VLC is the most popular media player in the market that can also be used as a video converter to convert many videos to MP4 format, including MKV to MP4, MOV to MP4, WMV to MP4, etc., and also convert files to WebM, TS, OGG, ASF, MP3, FLAC, etc. If needed, you can also enable the "Deinterlace" option to convert interlaced 1080i to 1080p or 720i to 720p. However, you should also notice that some high-resolution and large-sized videos can’t be converted very well as VLC is born to be a media player rather than a professional video converter.

VLC for Mac

How to free convert MKV to MP4 on Mac with VLC?

Step 1. Free download VLC media player for Mac, install and launch it.

Step 2. Click on the "Media" menu to select the "Convert/Save" option.

Step 3. When a new window pops up, click the "Add" button to add the MKV video file you want to convert to MP4.

Step 4. Click the "Convert/Save" button. In the "Profile" drop-down menu, simply select "Video – H.264 + MP3 (MP4)".

Step 5. Specify the output folder and the file name, click "Save", and then "Start" to convert MKV to MP4 free on Mac with VLC.

No.3: HandBrake

* A professional video transcoder to transcode any video.

HandBrake is a tailor-made video transcoder to let users convert between file formats. This Mac MKV to MP4 converter is suitable for both newbies and advanced users. For newbies, you can directly choose from the ready-made presets to convert MKV to YouTube, Android, Chromecast, etc. For advanced users, there are many customizable options to change the video parameters, like video codec, video resolution, FPS, bit rate, and so on.


How to free convert MKV to MP4 on Mac using HandBrake?

Step 1. Free download HandBrake video converter, install and launch it on your Mac.

Step 2. Drag and drop an MKV video to it, and you will go to the file conversion window.

Step 3. Under the "Summary" tab, select "MP4" from the "Format" drop-down list.

Step 4. Click the "Browse" button to rename your file with an .mp4 file extension and choose an output folder.

Step 5. Now, click the green "Start Encode" button to start converting MKV to MP4 on Mac with HandBrake.

No.4: OBS

* A free and open-source software for video recording and live streaming.

OBS is a free and open-source video recording, screen casting and streaming app which is especially welcomed by game players, broadcasters, and people who need live streaming. When using it as a video recorder, it can record videos in MKV, MP4, MOV, FLV, TS, or M3U8 format. By default, the app will save videos to MKV format as MKV can contain metadata, timestamps, frame rate, and more during recording while not losing frames. As MKV is not very compatible with all platforms, OBS also allows you to remux MKV to MP4 format with better compatibility.


How to remux MKV to MP4 on Mac for free with OBS?

Step 1. Run OBS and click File on the top menu bar, then select the "Remux Recordings" option.

Step 2. Add the MKV recording to the interface by clicking the three-dotted button under the "OBS Recording" section.

Step 3. Click the three-dotted button under the "Target File" to select an output path and rename the recording.

Step 4. Press "Remux" to start converting MKV to MP4 with OBS.

No.5: Remux

* Remux and recode video files to popular file formats, like MKV, MP4, M4V, AVI, TS, or VOB.

Remux is an FFmpeg-based MKV to MP4 converter for macOS users. You can use it to convert videos to MKV, M4V, AVI, TS, or VOB video files without re-encoding. Also, you can select, rearrange and duplicate tracks. The new version has added new AAC at presets encoded with Apple AAC, so you can convert DTS to AC3/AAC for AppleTV or PS3, for example.


How to use Remux to free convert MKV to MP4 on Mac?

Step 1. Free download, install, and run Remux on Mac.

Step 2. Click on "Single" to import a single file. If you want to convert multiple MKV files, you can choose "Batch processing" option.

Step 3. Drag and drop an MKV or more than one MKV videos to the interface.

Step 4. Select MP4 as the output format by clicking on the Save as option.

Step 5. Click Go button to start converting MKV to MP4 with Remux.

In conclusion:

The aforementioned 5 MKV to MP4 converters for Mac are totally free to use, and each one of them has advantages and disadvantages. So, you can choose the one you like most to convert MKV videos to MP4 on Mac.

BTW, seldom video converters dare to guarantee 100% quality maintenance in MKV to MP4 conversion process. So, to convert MKV to MP4 in high quality or remux MKV to MP4 without re-encoding, you should choose a professional MKV to MP4 video converter like WinX HD Video Converter for Mac.

Part 3. About MKV and MP4 Formats

MKV is the short of Matroska Multimedia Container. It is an open standard project, meaning it is absolutely free for personal use. As a multimedia container format, it can hold an unlimited number of video, audio, picture, subtitle tracks, chapter information, and movie thumbnail in one single file, along with any metadata.

MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet.




Video Supported

H.264, H.265, MPEG1, MPEG2, MPEG4 …

H.264, H.265, Xvid, MPEG4, …

Audio Supported




8bit, 10bit

8bit, 10bit

Closed Caption Supported


Not available


Same high

Same high

File Size

Relatively large

Relatively small

Platform Compatibility

Not so good on mobile devices

Very good on both PCs and mobile devices

Part 4. Frequently Asked Questions

1. How to convert MKV to MP4 on Mac?

To convert MKV to MP4 on Mac, you need a Mac MKV to MP4 converter. Good examples are WinX HD Video Converter for Mac, VLC, HandBrake, OBS, and Remux.

2. How to play MKV files on Mac?

Actually, the default media player – QuickTime doesn’t support MKV files on Mac. To play MKV files on Mac, you need a professional MKV player like VLC and 5KPlayer. Alternatively, you can use a video converter like WinX HD Video Converter for Mac to convert MKV files to Mac-supported formats to play without issues.

3. Is MKV better quality than MP4?

MKV and MP4 are both container formats. They can contain streams of video, audio, subtitles or metadata. So, it's hard to say which one is better in quality. Actually, when you use the same codec for both formats, there will be little or no difference between the two formats.


author - Donna Peng

Donna Peng twitter icon

Donna Peng's fascination with multimedia began at an early age - shortly after she licked the physical disc and then she's been obsessed ever since. Her decade-long career at Digiarty after the graduation has seen her unmatched expertise in the field of DVD, digital video, software and anything related to home theatre. She is currently fascinated with photography.

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