Can't run Dell UP2414Q at 4K 60Hz

Originator:ricky.romero
Number:rdar://15739666 Date Originated:2013-01-02
Status:Closed (Duplicate of 15592967 (Open)) Resolved:2013-01-07
Product:OS X Product Version:10.9.1
Classification:Performance Reproducible:Always
 
Summary:
OS X doesn't appear to include DisplayPort 1.2 drivers, preventing MST compatibility with the new crop of 4K displays.

Thunderbolt 2 includes the DisplayPort 1.2 spec, and 60Hz is supported in Windows 8.1 at 3840x2160 resolution, so this should also be supported in OS X.

Steps to Reproduce:
1. Connect a Dell UP2414Q monitor to a 2013 15" Retina MacBook Pro using a DisplayPort 1.2 cable, and select the highest supported resolution, 3840x2160, in System Preferences > Displays.
2. In the monitor's settings, select "Display Settings", then enable "DisplayPort 1.2."
3. On the connected UP2414Q, observe the compatible refresh rates in System Preferences > Displays.

Expected Results:
60 Hertz should be an option for the connected UP2414Q monitor at 3840 x 2160 resolution.

Actual Results:
The fastest available refresh rate is 30.3 Hertz, which results in no video signal being displayed.

Version:
OS X 10.9.1

Notes:
4K support in OS X is currently lackluster at best.  Please refer to this article on Anandtech for more information.  http://www.anandtech.com/show/7603/mac-pro-review-late-2013/11

Configuration:
This configuration requires a DisplayPort 1.2 cable, a Dell UP2414Q display, and a 2013 15" Retina MacBook Pro.

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