It is common, though, want or need to use a different program to open a particular type of file. This tutorial will explain how to open a file using a different program than the default one.

How to restore your default file extension associations in Mac OS In the Mac OS it is possible to change the default program the operating system will use to open a file when you double-click on ...

Click Open. If the app that you want to use to open the file type is greyed out, it's because macOS doesn't think there's a valid association between the two.