I didn&#x27;t know that Adobe RGB has a straight 2.2 gamma. :)<p>I don&#x27;t know the details about the Apple&#x27;s gamma curve, but these guys have measured it. Perhaps it gives some answers. (I&#x27;m not sure how to read that graph..)<p><a href="http:&#x2F;&#x2F;www.displaymate.com&#x2F;Gamma_35.html" rel="nofollow">http:&#x2F;&#x2F;www.displaymate.com&#x2F;Gamma_35.html</a>