How can I access the thousands of font files on my Mac without "installing" them and thereby slowing the machine to a crawl?
From my answer here:
From the FontXplorer website...
Is font management for you? Font management is for anyone who uses more than just a handful of fonts.
Ask yourself these questions:
Do you need to free up your system? Every font that has been activated on your system requires the deployment of system resources to applications. This can be an unproductive use of resources, particularly for fonts that are used infrequently. Font management allows you to activate fonts solely for the period of time you actually need them, freeing up precious resources so your system can run more efficiently.
Do you have trouble maintaining an overview of your fonts? Every professional creative application you install adds new fonts to your system that you may or may not want. Font management helps you find, preview, and sort fonts and deactivate the ones you don’t need.