AVI Files Won't Play on macOS Sierra - Solved

“I have a few old AVI video files on my Mac. After upgrading to Mac OS Sierra, I am unable to play those AVI files. What should I do to play AVI files on macOS Sierra? Please help me.”

Sometimes, you cannot play AVI videos on Mac using QuickTime player and each time when you try to open those AVI files, you come up with different error messages like "File Format not supported", "Not a valid AVI file", "The .avi could not be opened" etc.

Also, it is noticed that QuickTime won't play AVI videos on Mac after you upgrading to new Mac OS X like Sierra.

Why AVI Files Won't Play on macOS Sierra?

AVI is not just a video file type, in fact, AVI video file comes with several supported formats of codec like Xvid, DivX, MJPEG, MPEG-1, MPEG-3, MPEG-4, MPEG-H, MPEG-HD, etc. So, many AVI players for Mac including QuickTime player can't play all AVI files since they don’t possess all types of AVI codecs.

How to Play AVI Videos on macOS Sierra?

Solution 1: Download a QuickTime supported codec pack required for your QuickTime player to play your AVI files. Be cautious while installing codec packs because you may download virus or malicious script while downloading codec packs. Sometimes, the codec may conflict with other installed programs on your Mac.

Also, try installing Perian. It adds playback support for a wide range of video formats including AVI. So, install Perian on your Mac to play your AVI files using QuickTime player.

Note: Perian works only on Mac OS X Snow Leopard or previous version.

Solution 2: Convert AVI to QuickTime compatible video format using free video converter tool for Mac available online.

Solution 3: Try another AVI player for Mac: use other media players for playing your AVI files on Mac instead of QuickTime.

But, if your AVI file doesn’t play on any media player, then the only thing which is responsible for unusual behavior is video corruption. And, it seems your AVI files are broken.

Then, How Do I Play an AVI File on My macOS Sierra?

Remo Repair AVI is recommended software to fix unplayable AVI files on macOS Sierra. The HD video repair tool fixes audio and video streams separately then adjoin them together to render a healthy playable AVI video. Being a read-only utility, it just creates a replica of unplayable video and fixes the issue without modifying/damaging the original video file. Therefore, it keeps your original video intact throughout the repair process. Moreover, you can get this AVI video file repair software free download for both Mac and Windows operating system. Along with a free trial version, it also provides free 24x7 technical support for solving any issue related to the software.

This reliable video repair software comes handy to fix AVI, DIVX and XVID file format that is not playing on macOS Sierra, Mac OS X El Capitan or other Mac versions. It can easily repair corrupted video files that are stored on any storage devices like HDD, external hard drive, pen drive, memory cards, SD cards, flash drive etc. Also, works on recorded AVI files using digital cameras, media players, camcorders, and other digital gadgets.

3 Steps to Fix macOS Sierra Can't Play AVI Files:

Step 1: Launch Remo Repair AVI and Open AVI file which is not playing on macOS Sierra and click on the Repair button.

Step 2: The software fixes the selected video and gives a healthy playable AVI video. Verify the video using Preview repaired file option.

Step 3: At the end, Save the repaired file on your desired location.

Points to Remember:

• Do not frequently convert AVI file format to any other file format; use trusted AVI converter
• Avoid playing AVI files on unsupported media player
• Always maintain a backup of your important AVI videos