How do you change a file type on a Mac?

Fortunately, it’s easy to change your file associations in Mac OS X, if you follow these steps. 1. Select a file with the format you want to change (ex: an MP3, a JPG picture, an HTML file) in the Finder. 2. Right click on the file and choose “Get Info.”. 3. Change the application in the “Open with:” drop down.
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