FontExplorer X, and the later versions called FontExplorer X Pro (http://www.fontexplorerX.com) include the tools you need to clean your font caches. Here’s how.
Cleaning the System Font Caches
1. With FontExplorer’s window on your screen, click Clean system font caches… in the Tools menu.
2. In recent versions of FontExplorer X Pro, a window appears asking for your password. Older versions simply skip to the window in step 3. If the password window appears, simply enter your password and click the OK button.
3. The next window lists the actual files that make up the Mac OS X font caches. Click the Clean button.
4. At this point all versions of FontExplorer X and FontExplorer X Pro display the window asking for your password. Enter the password and click the OK button. The caches files are deleted and you’ll see the window displayed in the next step.
5. Cleaning Mac OS X font caches requires a restart, so once the files are deleted this window appears. Click the Restart button to restart your Mac, then go on to the next step.
Adobe, Microsoft, and Quark maintain their own font caches separately from the System font caches. FontExplorer
6. When the Mac reboots, launch Linotype FontExplorer again. This time, click Clean application font caches… in the Tools menu.
7. The next window lists Adobe’s, Quark’s and Microsoft’s font caches, and they’re clicked by default. Click the Clean… button.
NOTE: If you don’t happen to have any Adobe, Quark, or Microsoft products installed on your Mac, those selections will appear grayed out in the window.
8. You’ll see the window asking for your password. Enter the password and click the OK button.
9. The application font caches are deleted and you’ll see this confirmation window.
10. Last step. Just click the OK button in the box that says the font caches have been successfully removed. Now launch your programs and see if the fonts look as they should.