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.
Download and install the best free apps for Video Players on Windows from CNET Download.com, your trusted source for the top software picks. Hi Adrian, I just want to install OpenCV 3.0 on Mac to use with C++. I followed your instruction, but from Step 6 I exited the cv virtual environment and installed the rest globally, because I was afraid that it won’t work with XCode (or any other C++ IDE) if I keep installing under the virtual environment. Basic OpenCV Video Processing Tutorial Mac/Windows Play and Listen hi guys this is the final part of my opencv tutorial series in this video i will show you the basics of opencv video image processing using c this works on both mac and windows in a Basic OpenCV Video Processing Tutorial Mac/Windows Mp3.
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.

How to search for an app that works with your file
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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 these in your search:

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- The name of the media format. If you don't know 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.”
- The filename extension, which is the letters shown at the end of the file's name, such as .avi,.wmv, or .mkv.