You have to change the default player settings separately for every different file format such as MOV, AVI, MP3, and MP4.

You can change the default media player for any audio or video file on your Mac.

Use your mouse or touchpad to move your cursor on the file, and right click on it to expand a drop-down menu of options.

This option will be at the top of the third section on the right-click menu.

The file format extension indicates the format and type of the file youre handling.

The selector displays the current default player for this file format.

Clicking on it will expand a drop-down list of available media software.

Click on the media software you want to set as your new default player for this file format.

This will let you browse all your applications, and select a different software.

It will open the Mac App Store, and list all media players that will play, edit, or convert this file format.

This will change your default media player selection for all files with the same file format extension.

Changing the default player for an audio or video format will not apply your changes to all file formats.

This will confirm your action and apply your changes to all files on your Mac with the same file format extension.

Find an audio or video file on your Mac.

Right-click on the file.

Click Get Info. 4.

Click the selector under Open with.

Select a media player.

Click Change All.

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Media Player 13.6 For Mac