DOWNLOAD:
Mac OS X 10.8.x Mountain Lion: GIMP 2.8.2 for Mountain Lion
Mac OS X 10.6.x Snow Leopard & 10.7.x Lion – 64 bit: GIMP 2.8.2 for Snow Leopard & Lion
Mac OS X 10.6.x Snow Leopard – 32 bit: GIMP 2.8.2 for Snow Leopard
Mac OS X 10.5.x Leopard – still uses X11: GIMP 2.6.11 for Leopard
Mac OS X 10.4.11 Tiger – still uses X11 : GIMP 2.6.11 for Tiger
GIMP 2.8 User Manuals:
GIMP 2.8 User Manual – english
GIMP 2.6 User Manual – spanish
GIMP 2.6 User Manuals:
GIMP 2.6 User Manual – english