![]() In this case, the best way to fix “VLC won’t play MP4” on Mac is to use an alternative media player.Īlthough Apple has pre-installed a video player -QuickTime on Mac, it has many playback restrictions. With the release of Monterey, lots of users began to report the incompatibility of VLC. #6 VLC is not Compatible with the Newest Mac Operating SystemĮvery time a Mac system is upgraded, VLC will encounter compatibility problems, no matter macOS Mojave, Catalina, Big Sur, or Monterey. ![]() Convert MP4 to AVI, and open it in VLC.Select “Always fix” in the drop-down box next to “Repair AVI Files”. In the “Preferences” dialog, click the “Input/Codecs” tab.But don’t worry! VLC itself contains an automated system for repairing corrupted or damaged AVI videos. Of course, VLC won’t play a corrupted MP4 file on Mac. Once virus appears, run a trusted antivirus program to keep Mac safe. The infection will make VLC not playing MP4 file or playing it with no sound. Solution: Run the antivirus program and re-download the MP4 file. Thus, please check whether your MP4 file is null-size or not. Or an error or disconnection occurred during your download of this MP4 file. It may be damaged by malicious software infection and virus attack. Undoubtedly, VLC won't open 0 KB MP4 file. In the dock, right-click the Finder icon and choose “Go to Folder”.Launch Terminal app and enter the command: defaults delete.VLC will ask for confirmation, click the “Continue” button.įor users who are unable to open VLC, using the command line to reset an excellent way. The simple way is to go to VLC menu, open the “Preferences” window, and click “Reset All”. If you customize VLC settings incorrectly during use, it will also lead to VLC not working on Mac. Exist VLC app and open MP4 file with it again.Find the “Hardware Decoding” option, and uncheck the box.Navigate to the menu bar > Click “VLC” > “Preferences” to call up a setting window.Solution: Disable hardware video decoding option in VLC It will result in VLC won't play MP4, choppy playback, or stuck issues, as the hardware decoding can't deal with the rendering effects. #2 Too Many Rendering Effects or Subtitle Tracks in MP4 Video It will process all MP4 files at the same time. Click the “gearwheel” icon and tweak the video settings.Choose the output format like “MP4 Video”, which is encoded in H264 + AAC.Drag-n-drop MP4 files into the converting interface.Download and launch Cisdem Video Converter.If you are a seasoned user, you can also manually configure the video codec as you like. This means you can play your videos on almost all video players and apps, like VLC, QuickTime, iPhone, iPad, Android, LG TV, Sony TV, etc. It's able to convert MP4 or any other media file to 300+ outputs formats and preset devices. Solution two: Convert MP4 codec to a codec supported by VLCĬisdem Video Converter is the best video conversion and download tool for Mac. ![]() If necessary, check the box in front of “Automatically download and install updates in the future”.
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