Don't you get mad when you find a really nice font and don't know how to install it? A typeface can change everything for a text: presentation and aesthetics are all important elements of a document. Still, it's pretty easy to install a font.
Steps
Method 1 of 2: Use Font Book (Recommended)

Step 1. Download the fonts you need, using a search engine
Open a web browser and type in "free fonts". Choose the font (s) that are right for you.

Step 2. Unzip or extract the fonts from their ZIP files
Once you have unzipped the fonts, they should appear as.ttf files ("TrueType fonts" or "TrueType font").

Step 3. Double-click on the font you want to install
Then click on the "Install" button when the font appears in Font Book.

Step 4. Install other versions of the fonts
You can install bold or italic fonts using the same process. If you need the bold or italicized versions, use the same method as described above.

Step 5. Restart your computer if the fonts do not appear automatically
Method 2 of 2: Install it manually

Step 1. Download the fonts you need using a search engine
You will find either free fonts or fonts to buy online.

Step 2. Unzip or extract the fonts from their ZIP files
Once you've unzipped the fonts, they should appear as.ttf files ("TrueType fonts" or "TrueType font").

Step 3. Drag and drop the font file (s)
Depending on the operating system you are using, drag the font as well.
- Mac OS 9.x or 8.x: Drag files directly to the System folder.
- Mac OS X: Drag files to the Fonts folder in the Library folder.