Apple apps such as QuickTime Player, Photos, and Keynote work with many kinds of audio and video formats. Some apps prefer specific formats, but QuickTime movie files (.mov), most MPEG files (.mp4, .m4v, .m4a, .mp3, .mpg), some AVI and WAV files, and many other formats usually work in most apps without additional software.
Older or specialized media formats might not work in your app, because the format requires software designed to support it. If that happens, your app won't open the file or won't play back its audio or video.
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May 23, 2016 - Changing the Default Application for File Types in OS X. And there you go, now you can open your video files in VLC instead of QuickTime.
How to search for an app that works with your file
You might already have an app that supports the format of your file. If you don't know which of your installed apps to try, your Mac might be able to suggest one:
- Control-click (or right-click) the file in the Finder.
- From the shortcut menu that opens, choose Open With. You should see a submenu listing all of the other installed apps that your Mac thinks might be able to open the file.
If none of your installed apps can open the file, search the Internet or Mac App Store for apps that can play or convert the file:
- Include the name of the media format in your search. To find the format, select the file and press Command-I to open an Info window. The format might appear after the label Kind, such as ”Kind: Matroska Video File.”
- Include the filename extension in your search. The extension is the letters shown at the end of the file's name, such as .avi,.wmv, or .mkv.
Learn more
- QuickTime Player (version 10.0 and later) in OS X Mavericks through macOS Mojave converts legacy media files that use certain older or third-party compression formats.
- Learn about incompatible media in Final Cut Pro X and iMovie.
Not sure when this feature got added, but since this was new to me, thought this was worth sharing.
Launch QuickTime Player (it’s in your Applications folder). Now select New Screen Recording from the File menu, or type control-command-N. A small screen recording window will appear, like so:
Click the little triangle on the right side of the window to adjust microphone and mouse click options. When ready, click the record button in the center of the window. Click and drag a section of the screen to record part of the screen or just click to record the entire screen. Once you do that, click to start recording. Click the stop button that appears in the menu bar to stop recording.
Pretty easy, and the end result is a QuickTime movie you can use anywhere you’d expect (iMovie, YouTube, etc.) Clearly not a method a pro would use, but if your needs are relatively simple, this is a great solution.