If you need to change the default application that will be used to open a particular file type on a Mac OS X system, you can do so by taking the following steps:
- Right-click on a file of that type in the Finder.
- Select Get Info.
- Click on the triangle to the left of "Open with", then select the application you wish to use to open files of that kind.
- Click on the Change All.. button.
- When asked to confirm that you want to change all similar documents to open with the application click on the Continue button.