Simply double-click the file you downloaded.
Or you can place hte file in Applications/Adobe Illustrator CS6/Presets/Swatches and relaunch Illustrator.
Oh so simple! Tons of online advice says to go to the user/library/applications/adobe/illustrator and look for swatches there. Obviously, NOT!
All so easy once you know. Thanks!
How do you do this same process on an imac?