I want to delete every single font I have downloaded, that did not come standard with my Macbook. I have both, my installation disk & application disk. Now technically, I don't want to have to delete them one by one, but if I have too as the last resort, that's fine. But, if I was to do them one by one, how do I know which fonts came with my laptop as standard, and which ones I downloaded. I have around 270 fonts in total.