Fonts included with each version of Mac OS X

Font Name snow leopard leopard tiger panther jaguar puma cheetah
  10.6 10.5 10.4 10.3 10.2 10.1 10.0
Release date 2009-08 2007-10 2004-05 2003-06 2002-05 2001-09 2001-03
American Typewriter X X X X      
Andale Mono X X X        
Apple Braille X X          
Apple Chancery X X X X      
Apple Gothic X X X X      
Apple LiGothic Medium X X X X      
Apple Symbols X X X X      
AquaKana X X X X      
Arial X X X X      
Arial Black X X X X      
Arial Narrow X X X X      
Arial Rounded X X X X      
Arial Unicode X X          
Baskerville X X X X      
BigCaslon X X X X      
Brush Script X X X X      
Capitals              
Chalkboard X X X X      
Cochin X X X X      
Comic Sans MS X X X X      
Copperplate X X X X      
Courier X X X X      
Courier New X X X X      
Didot X X X X      
Futura X X X X      
Geeza Pro X X X X      
Geneva X X X X      
Georgia X X X X      
GillSans X X X X      
Hei X X X X      
HelveLTMM X X X        
Helvetica LT MM X   X        
Helvetica X X X X      
Helvetica Neue X X X X      
Herculanum X X X X      
Hiragino X X X X      
Hoefler Text X X X X      
Impact X X X        
Kai X X X        
Keyboard X X X X      
LastResort X X X X      
LiHei Pro X X X X      
LucidaGrande X X X X      
MarkerFelt X X X X      
Menlo X            
Microsoft Sans Serif X X          
Monaco X X X X      
Optima X X X X      
Osaka X X X X      
Palatino              
Papyrus X X X X      
Skia X X X X      
STHeiti Light X X X X      
STHeiti Regular X X X X      
Symbol X X X X      
Tahoma X X          
Techno              
Textile              
Thonburi X X          
Times X X X X      
TimesLTMM X X X        
Times New Roman X X X X      
Trebuchet MS X X X X      
Verdana X X X X      
Webdings X X X X      
Wingdings X X X        
ZapfDingbats X X X X      
Zapfino X X X X      
sources:
http://support.apple.com/kb/TA21654?viewlocale=en_US
http://en.wikipedia.org/wiki/Mac_OS_X
http://support.apple.com/kb/ht1642
http://support.apple.com/kb/HT2444?viewlocale=en_US
http://www.prepressure.com/fonts/basics/snow-leopard-fonts/list