this does not work. does it matter that it is a mac. i tried this after seeing you post it on another forum for windows. i just tried it 3 times tonight.

(setenv "2D Model grid axis lines color" "6114631")
(setenv "2D Model grid major lines color" "6901577")
(setenv "2D Model grid minor lines color" "4732722")

this is what i pasted in command line