Is the number of fonts you can comfortably have installed a function of which version of OS X you have, or how much RAM you have, or what? Would a dedicated Font Manager other than Font Book improve capacity? How many fonts have been installed at any one time on your computer? I foolishly attempted to install all of a mega-package of fonts from a friend (15,000 of them). Font Book crashed, of course. This laptop runs 10.7 and has 8 MB RAM - do you think I should be able to have 500 fonts installed? 1000? Would upgrading to 10.8 help?