Full RGB Dynamic Range 0-255

Question

Level 1

9 points

Full RGB Dynamic Range 0-255

Hello,

I got a second monitor on my iMac27 late 2013 : Eizo CX271.

While booting on windows 10 bootcamp, in the nvidia drivers I got an option "RGB" with "Full dynamic range" and "0-255". That enables true blacks and true whites on my screen and images are better than what i'm getting while i'm on macOSX, where the blacks seems to be faded and white a little off.

Is there an option to get this Full Dynamic Range working on macOSX ?

Bests

iMac (27-inch, Late 2013), OS X El Capitan (10.11.6)

Posted on Aug 24, 2016 8:15 PM

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Answer 1

efreetcs Author

Level 1

9 points

Aug 25, 2016 12:24 PM in response to steven_a1

I already a lot of calibration with different tools :

- displayCal

- basICColor

- ColorNavigator NX

- i1Profiler

which i used with an i1Display Pro.

But definitely, the mac screen from my iMac got pure blacks and pure whites. My Eizo screen CX271 haven't the same range of lights.

To compare, i have done a simple thing :

While booting on windows10 bootcamp, i disabled the "full range" to make it 16-235, and i got the same rendering as when i'm in macOSX : blacks are lighter and whites are darker on the Eizo CX271. When i activate again the "full range" to "0-255", the rendering of the iMac screen equals the Eizo CX271 with pure blacks and pure whites.

I think there is a problem for MacOSX to send via DisplayPort the correct signal in 0-255 range and send just a 16-236 signal...

Eizo reported before an issue with other screens :

http://www.eizoglobal.com/support/compatibility/displayport_thunderbolt/

That's why I suspect I got the same for my CX271.

This is not an hardware problem (it works fine on windows bootcamp, so the DisplayPort is ok) but i really think that MacOSX don't send a good signal.

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Answer 2

steven_a1

Community Specialist

Aug 25, 2016 10:25 AM in response to efreetcs

Hi efreetcs,

I understand that you would like the match the color profile being shown on your iMac in OS X to be more similar to what you are seeing in Windows with Boot Camp. I know it's important for your display to work best for you, so I'm happy to provide some help with this.

You will find that you can control the color profile being used on your iMac, and calibrate it to your needs under System Preferences > Displays > Color. Check out more about this here:

OS X El Capitan: Set your display’s color profile

OS X El Capitan: Calibrate your display

Thanks for using the Apple Support Communities, cheers!

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