BACKGROUNDPerhaps the single most important thing that brought the Macintosh to success was fonts. Before the Mac, fonts were an after thought for computer systems. On many, if you wanted a font beyond the stock Times, Helvetica, Symbol, and Courier, you had to craft (program) it yourself! And even then most were bitmap fonts and looked anything but professional on the printed page.
Then along came the Mac, with dozens of fonts, and later PostScript to deliver razor sharp text to the printed page.
Life was wonderful. Right up until you started adding fonts to your system. Then the sky darkened. A document would display one font on the screen, but another in print. Page and line breaks changed. Perhaps the system would not even boot!
All due to improperly installed fonts, damaged fonts, or font conflicts.
Prior to Mac OS X, we had some severe limitations on the total number of fonts the system could handle. This was worked around by font management utilities such as Suitcase. With the release of Mac OS X, we no longer are constrained by these limits (unless you consider a few billion fonts a limitation). However, there are still best practices to installing fonts to avoid their wrath.
FONT STORAGE LOCATIONSThere are three primary locations where fonts may be stored for use, and a couple of secondary locations:
1. ~/Library/Fonts. This is the Fonts folder located inside the user home Library folder. This is the first place the system looks for fonts. The advantage of this location is that any
user may install fonts here for their own use (other users will not have access to these fonts). The disadvantage is that most users will install fonts here improperly, with problems
following (more on this later).
2. /Library/Fonts. This is the Fonts folder located in what is called the root Library folder–the Library folder found directly on your hard drive. This is the second place the system
looks for fonts. The advantages of this location are that fonts located here may be used by any user account on the computer. Also, only administrator accounts are able to install
fonts here. The assumption is that admins know the proper installation strategy. However most don’t, which results in problems (again, more on this later).
3. /System/Library/Fonts. This is the fonts folder located in the Library folder within the System folder. It is the last place the system looks for fonts. Though it is possible for any administrator account to install fonts here, it is intended only for Apple to work with, all others should keep away.
And lastly, some applications will install fonts in secondary locations. This can be within the application folder itself–common practice for accounting programs–or hidden within the application. They can also store fonts in either the ~/Library/Application Support or /Library/Application Support folders. For an example, if you have an Adobe product installed, check out /Library/Application Support/Adobe/Fonts. This all allow the application to have exclusive access to a font by any user, but prevents other applications from using the same fonts.
HOW NOT TO INSTALL FONTSJust say “no” to drag and drop. I know, you’ve done it for years without a problem. But you may have been living on borrowed time.
Apple has a better way... The Font Book!
HOW TO INSTALL FONTS USING FONT BOOK

Mac OS X includes the Font Book application, located in your /Applications folder. Use this simple utility to replace your drag and drop installation for fonts. But it does something that drag and drop can’t do–it validates your fonts to make sure they are not seriously corrupted, and modifies their font ID numbering so they don’t conflict with any other fonts you have installed.
1. Open /Applications/Font Book.
2. Select the Font Book > Preferences menu. Configure as here, then close Preferences:

3. Select the File > Add Fonts menu.
4. From within the Add Fonts menu, locate the fonts you want to add to your computer (on CD, copied to your Desktop, etc.), select them, then click the Open button. Your fonts are now repaired and installed into the /Library/Fonts folder
5. Quit Font Book
Tags: fonts, Font Book