Texas Instruments TINSPIRE Software Installation Manual page 48

Macintosh®:
1. Right-click the .tns file.
2. Navigate to the program application file you want the file associated
with.
3. Select the "Always Open with check box."
4. Click Open.
Note: These examples where taken from Windows® XP and
Apple® 10.6. The basic concept is the same in other versions as well, but
there may be slight variations. If you need information on your particular
system, search the term Associate Files in your operating system's help.
44 Installing and Activating TI Software