1. Double click the folder with the downloaded fonts in it.
2. Double click the hard-drive icon (in the top right corner of your screen).
3. Double click your System Folder, and scroll the window down until you see the "Fonts" folder
4. Drag the fonts file onto the font folder.
Your new fonts are now installed, and any program you start will be able to access them. If the program you want to use is already running, you will need to quit the program and restart it before it will recognize the new fonts.