The Jack Nicklaus Screen Savers are available for Windows 95 or later and MacOS X (10.2 or later).

Click on the version for your system and when the installer is downloaded double-click or run the program to install the screen saver on your computer.

If you want to uninstall the screen saver go to the Display control panel on the PC or System Preferences > Desktop & Screen Saver pane on the Mac and click on the screen saver adn choose the delete this screen saver option.