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If you’ve ever double‑clicked a video on your Mac only to see QuickTime refuse to open it, there’s a good chance the file was an MKV. This is a common frustration for macOS users — and it’s not because the file is broken. In this article, we’ll expla...

You double-click a video file someone sent you. It's an .mkv, an .avi, or a .webm. Instead of your video playing, you get the same frustrating error: "The file ... is not compatible with QuickTime Player." We've all been there. We love our Macs for t...
