Compared to the PC side, there is a dearth of font viewing software for Macs. In particular, none of the freebies and few of the for-pay font utilities I have found allow you to view uninstalled fonts. However, you can view the character sets for your fonts, whether installed or uninstalled with this Mac OSX Leopard (and beyond) trick.
Open a finder window and select the fonts you want to view. Here I have filtered my downloaded fonts folder by searching for “ttf” to eliminate most of the folders and read me files. It doesn’t matter what view you are in. I am showing this in the cover flow view, because some of you may not know you can use it for fonts.
Next just tap the space bar (or the QuickView icon which looks like an eye) and your font slide show window will appear. Use the arrow keys to navigate or click on the triangle on the screen to play the slideshow automatically. In Lion it looks like you have to press the full screen button before you get the slide show option.
The contact sheet button works, too, though it acted a little quirky for me .
This is really a lot of fun to play with. Hope you enjoy it as much as I do.