OK, this is really frustrating me now.
I've tried CS3, CS4 both on a Late 07, maybe early 08 White Macbook running Leopard 10.5.8, 4GB Ram, 2.1GHz CPU.
I installed CS4 without a hitch, but when I go to open it sticks on "Initializing User Interface" at the splash screen and then crashes and quits. This happens with CS3 as well, and I am unable to open anything.
I've tried to delete user preferences, create a new user and try there, repair disk permissions, connect an external monitor and try again, nothing works!
Any suggestions to get this to work?