It would display fine since it contains the screen fonts, but would print terribly since the OS would use those same low res screen fonts for the output since the vector outlines were missing. The fonts are now installed and will appear in the font menus of your Carbon and native applications. In OS 9 and earlier, and in earlier version of OS X, you could open just the suitcase part of a T1 PS font and you could use it./Users/Library/Fonts/ Note: Fonts in this location can be used only by the specified user.Fonts in this location can be used by any user. Font Book flags duplicate fonts, identifying them in the Fonts list and in the information panel. Avoid installing duplicates of typefaces already present in your Mac OS X font library.

/Library/Fonts/ Note: You must be logged on as an “Administrator” to place fonts in this location. Once Font Book launches and displays the preview, click on the 'Install' button to activate the typeface.(Note that the fonts must be loose in the destination folder, not in a subfolder.) And help us in this small utilities Gdipp and MacType. Copy or move all the font files from their individual font folders into either of the following locations. Although Microsoft uses and uses its own anti-aliasing system called ClearType, Still, many would prefer the method used in Mac OS.Locate the folder that contains the fonts you want to install.Before installing your fonts, quit all active applications.To install your fonts using a font management utility (e.g., Extensis Suitcase, Font Reserve, FontAgent Pro or MasterJuggler), refer to that utility’s documentation for instructions on adding and activating the fonts. Fonts installed in the OS X native environment can be accessed by (a) any user, or (b) just by an individual user. However, fonts installed in OS X system locations are not available to “Classic” applications.

Mac OS X has native support for Type 1 and OpenType fonts, which can be installed just like other font types on OS X.

How to install fonts on mac os x