Macbook Pro panels used to be 6 bit giving you only approx.. 256,000 colors. Then the millions from dithering. And apple do not tell you anything. You must have min 8 bit panel to get millions of colors....
What it is today I do not know......
I heard that 13 inch screen is 6 bit still. ...
Please let me know about 2013 retina screens.....
??
Cheers elo