The packages found on these pages are in the .tar.gz format.

To install do the following steps

1. Open the Terminal (in /Applications/Utilities)
2. Change to the directory with the .tar.gz archive using the cd command. For help with the cd command type man cd.
3. Type tar zxf package.tar.gz.
4. cd package
5. List the directory contents by typing ls.
6. Read the README file, usually README.MacOS_X, by typing less README.MacOS_X.
7. Follow the instructions.
8. The installation usually requires executing a sudo command.