The Mac opens data files (pics, sounds, docs) in applications automatically, but you can change which apps they use in a few simple steps. Change the Default Application a File Opens With on Your Mac. Each file type has a default application that is associated with it. This means that when you double-click a file from the Finder it will open a specific application, for example on a fresh Mac OS X installation, all image files (png, jpg, gif, pdf, etc) will default to opening in Preview, and all.
Hi markyrwol, A default program is the program that Windows uses when you open a particular type of file, such as a music file, an image, or a webpage. For example, if you have more than one web browser installed on your computer, you can choose one of them to be the default browser. You may change (set another program as default program) your default program following the steps mentioned below: 1. Open Default Programs by clicking the Start button, and then clicking Default Programs. 2. Click Associate a file type or protocol with a program. 3. Click the file type or protocol that you want the program to act as the default for. 4. Click Change program. 5. Click the program that you want to use as the default for the file type you selected, or click the arrow next to Other Programs to show additional programs.
(If you don't see Other Programs, or your program is not listed, click Browse to find the program you want to use, and then click Open. If no other programs are installed that are able to open the file type or protocol, your choices will be limited.) For more information, you may visit the link mentioned below: Change which programs Windows uses by default Hope this information is useful. Regards, Sujan – Microsoft Support Visit our Microsoft Answers Feedback Forum and let us know what you think.