These knowledge base articles on Apple's site should help:
On May 2, 2004, at 12:36 PM, [log in to unmask] wrote:
> Hello everyone!
> I am trying to switch over to OSX (10.2.1) on my Mac and I am very
> confused about where all my fonts are and what they are doing! (I
> know, I am very behind the times in this endeavor!)
> Do I have to reinstall all the fonts that were in my classic 9 system
> folder into X? I know OSX comes with a ton of fonts--where they are
> housed, I have no idea..but for the life of me, I can't seem to find
> helvetica oblique which I know is in my system 9 fonts folder.
> I am working in illustrator 10 and when I try to make my helvetica
> type to be oblique, my only 2 helvetica options seem to be regular and
> bold. Then I noticed at the bottom of the font list (in bold face),
> something called Helvetica CY--is that just for running the program? I
> am baffled.
> Any help would be greatly appreciated before I flee back to system 9!
> Thanks to all of you in advance!
> Take care,
> Wendy Beth Jackelow
> Medical & Scientific Illustration
> 266 Pelton Avenue
> Staten Island, NY 10310
> Tel/fax (718) 273-00002
> [log in to unmask]