macOS 10.13 (MacBook Pro Retina 13" Mid-2014) - [email protected] not supported over HDMI ...
 
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macOS 10.13 (MacBook Pro Retina 13" Mid-2014) - [email protected] not supported over HDMI - GTX 1060  

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(@akash4393)
Eminent Member
Joined: 3 years ago
 

I recently purchased two Samsung U28E590D 4K monitors. I am using DP for the first display and HDMI for the second. After setting everything up and trying 3 different HDMI 2.0 supported cables, I realized that Mac doesn't support [email protected] over HDMI. Even though the HDMI port in my GPU is HDMI 2.0b and should support 4K@60.

I tried using the same setup in windows and both displays work perfectly at 4K@60. So this is not a hardware issue, rather it's some weird software issue where MacOS is just not allowing the GPU to run a display at [email protected] over HDMI. I have tried disconnecting the DP display and just connecting one display over HDMI, in which case I see the option to run the monitor in 1080p HiDPI mode at 60Hz but selecting that option results in a black blinking screen on the monitor and my internal display flickering as if I am continuously connecting and disconnecting the display.

My Setup:
Laptop:
Mid-2014 MacBook Pro Retina 13"
macOS 10.13.3 
Egpu:
GTX 1060 6GB

Egpu Case:
Akitio Node

Monitor:
Samsung U28E590D

2019 16-inch MacBook Pro (i9/1TB/64GB/5500 - 8GB). Akitio Node (Corsair SF600) - Vega 64


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mac_editor
(@mac_editor)
Famed Member Moderator
Joined: 3 years ago
 

This is a known issue with macOS - and I have experienced it firsthand. My setup is also 2 4k60 monitors. Only DP outputs at 60hz on macOS. Windows is gold.

purge-wranglertbt-flashpurge-nvdaset-eGPU
Insights Into macOS Video Editing Performance
2018 MacBook Pro 15" RP560X + RX 5700 XT (Mantiz Venus)

Master Threads:
2014 15-inch MacBook Pro 750M
2018 15-inch MacBook Pro


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(@izak_filmalter)
New Member
Joined: 2 years ago
 

Give the following a try, no Idea if it will work.

https://github.com/Floris497/mac-pixel-clock-patch-V2

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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(@akash4393)
Eminent Member
Joined: 3 years ago
 

@mac_editor Thank you for clarifying that. I was breaking my head over wires and HDMI protocols. Do you know if there is thread for tracking that issue so that I can stay updated on the topic.

@izak_filmalter I tried the coreDisplay patch based on the author's last commit. The patch just added the option to switch to 4k@60 in the SwitchResX menu. Although, selection that options causes the display to start blinking as if I were continuously connecting and disconnecting the source cable.

2019 16-inch MacBook Pro (i9/1TB/64GB/5500 - 8GB). Akitio Node (Corsair SF600) - Vega 64


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mac_editor
(@mac_editor)
Famed Member Moderator
Joined: 3 years ago
 

@akash4393 I have asked dev relations about this and apparently they have simply not incorporated HDMI 2.0 as of macOS 10.13.4. However, in my testing with the 1070 eGPU, I was able to output 4k60 (Web drivers probably support this) on the eGPU monitors via HDMI. By default, it was at 30Hz, but I noticed in Display settings that it was set to "scaled". Setting it to "default - best for display" worked. Maybe check that.

purge-wranglertbt-flashpurge-nvdaset-eGPU
Insights Into macOS Video Editing Performance
2018 MacBook Pro 15" RP560X + RX 5700 XT (Mantiz Venus)

Master Threads:
2014 15-inch MacBook Pro 750M
2018 15-inch MacBook Pro


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(@kim_chen)
New Member
Joined: 2 years ago
 

The same here with MBPR Mid-2017 10.13.4 + ASUS ROG-STRIX-RXVEGA64. 2 DP work perfectly, but HDMI can just output 4k30. Do you think Apple would take it seriously?

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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