Dell U4919DW / MacBook pro 5k issue

I recently ran into this with:

MacBook Pro 15-inch 2018 - V10.14.6 (staying away from Catalina for now)

Samsung 49" 5120 x 1440 https://www.samsung.com/levant/monitors/c49rg9/

Initially tried with a USB-C to HDMI (multi-port) that I already had on hand

https://www.apple.com/shop/product/MUF82AM/A/usb-c-digital-av-multiport-adapter

It displayed at full resolution, but everything was pink.

Picked up a USB-C to HDMI 4k - specifies "resolution up to 3840 X 2160 @ 60Hz", but I like to live dangerously.

https://en.j5create.com/products/jcc153g

With the internal macbook display on, it displays at 3840 x 1080 @ 60Hz.

With the macbook closed, it displays at 5120 x 1440 @ 100Hz

Attemped SwitchRex - it just scaled the resolution, which made text blurry.

For now I'm going to close it and hope a fire doesn't start. Also posted a question to a product to see if an answer comes back via that avenue - https://www.apple.com/us_edu_194934/shop/product/HLR62ZM/A/moshi-usb-c-to-displayport-cable

Apologies for the double post -- turns out it was not displaying at 5120x1440 with the lid closed, but was actually 3840x1080 and scaled (according to the About this mac -> displays).

Ended up purchasing an 8k USB-C to DisplayPort 1.4 (https://www.amazon.com/gp/product/B07R3ZQBS6) today.

It shows higher resolutions in the 'Scaled' menu (up to 7680x2160), but all tagged with 'low resolution'.

5120x1440 (low resolution) setting seems to set it to 3840x1080 and scaled up (according to About this mac -> displays) -- this seems to also be the 'Default for display' setting.

Tried clamshell open and closed.

I'm thinking the Macbook Pro 2018 just can't do it.

I doubt that the Intel HD Graphic Card is the problem or the performance limit.

If you use Bootcamp the 5120x1440 are working out of box without and problems! It is definitly a MacOS driver or better settings problem that Apple needs to fix! Every Windows laptop with USB-C and Intel Graphics Card is working flawlessly at the resolution of 5120x1440x60Hz.

Hey community - first I just want to say thank you for collectively chasing this one as far as you have! I have actually learned a lot after 28 pages of posts :)

I also have a 2018 MBP 13" - and I just purchased the new samsung grc9 49" monitor this week and hit this same issue. And, I did not find a similar thread on the samsung site, so broadened my search and landed here.

Thank you to those who found the work-around of PBP with sep spaces turned off - it ain't ideal - but at least I can sleep at night! I also agree that for those of us who do regular skype/hangout screen sharing - this mode actually has some merit.

Any way - just wanted to say thanks for chasing this one for a year - and come-on #Apple - please figure this one out!

Thanks for this. Seems like it's working fine. Since it's a Dell display, it should show the resolution and refresh rate when you click the menu button? e.g. My Dell P2415Q shows the display model name top left of the menu, then bottom left shows HDMI connector Resolution: 3840x2160, 24Hz. Maximum: 3840x2160, 60Hz. I looked at the Dell U4919DW manual and didn't see any menu that showed the current timing; was that info removed from the pictures?

There is a Color menu in the Dell's onscreen menu which shows Input Color Format. The options are RGB and YPbPr. If it's YPbPr then it might indicate chroma subsampling is being used.

Does Intel Graphics Control panel allow you to create any timing between 4096 and 5120 wide? Or timings that are 5120x1440 with lower refresh rates?

On my Mac mini, GPU-Z doesn't show anything in the Advanced tab. Is yours the same?

Can you provide AGDCDiagnose output for each port of the display? This is probably not necessary but might be interesting. It will give more info than SwitchResX does. You can zip them and message it to me on MacRumors.com.

@moejetz and that is the part of this topic! The problem is the Intel HD Card. Your 15" MacBook is using the Radeon graphics card. The people here are complaining that their Intel graphics card is not working.

I read your post but we all can ignore your 15" notebook because it's not part of the problem because of the different GPU. Other people already used external GPUs and could solve the problem with them too but we all here want a out of the box solution.

Don't waste your time. I have contacted APPLE and their So-called Senior Advisor told me they cannot fix it right now(11-02-2020). Their engineer team even don't know what is the problem. They do not have a date to fix this.

Then I asked for full refund because in your website mentioned that mac mini-2018 support "Maximum" up to 5120x2880 but right now they do not support 5120x1440 which is half of above. They said they can do nothing for me but wait.

I have sent an email to my local customs and ask them to help me make a refund for false advertising on Apple's part. If it does not work I will go for credit card charge back.

This resolution problem of 5120x1440 was discussed since Jan 2019, no solution was given by Apple after 1 year. What do you expect? Trash

For those who raised this problem one year ago having problem with Dell 49" monitor (5120x1440), I have to send you my love. How can you wait for ONE year for this stupid problem, which can work on Window / Window installed on Mac, but not on Mac itself.

*Using Mac Mini 2018 with HDMI 2.0 cable(by Samsung) connected to Samsung C49RG90 with 3840x1080 resolution only*

In fact, I think most of them have come to terms with the problem. You can operate the monitor in picture-by-picture mode. This even has one or the other nice side effect (full screen only on half of the monitor). Others have switched to an eGPU. And nobody expects Apple to actually fix the problem.

No news, except that the new MacBook Air 2020 has new Intel graphics that is not limited to 4K width in macOS (like for earlier Intel graphics) so this problem shouldn't occur for that Mac.

It supports DisplayPort 1.4 and Display Stream Compression (DSC) so it can run the Apple Pro Display XDR at 6K 60Hz.

They are capable of supporting 6k. However, the 32:9 issue discussed here is not a question of maximum resolution, but of Apple's special way supporting pixel ratio (16:9, 16:10, 21:9 are ok, 32:9 is not). I would not bet on support for the Dell, even with the latest Intel graphics chipset. We will see.

On the other hand I must admit that I have become accustomed to the PbP function as much as possible. Even if Apple would support the 32:9 ratio in future macOS versions, I think I will not switch back from PbP. Main reason is the window handling. I use this Windos-like "Snap" feature, which allows maximizing windows to the left or the right side of the display (with a 16:9 2560x1440 half-monitor size resolution). With the 32x9 ratio, you would always maximize windows to the full width of the screen.

As some users stated that this is an issue only concerning Intel based graphic cards - my experience is different.

I'm using a Mac Pro - Late 2013 with an AMD FirePro D300. Monitor is connected with a DP to MiniDP cable.

If I switch from the Mac Pro to my Lenovo Laptop with Windows 10 (same MiniDP cable) I get the full resolution instantly. Switching back to the Mac Pro it is at 3840x1080.

Contact Apple Customer Service and explain that this model appears to be falling short its advertised specs, and Apple Support has told you its not broken and that's as good as it gets. Be courteous and Professional. Apple wants you to be a Happy customer, if possible.

No it wasn't in the refund window anymore, I bought it a year ago in the Apple online shop. I just contacted Apple tech support, told them about the issue and they said there is nothing they can do then to wait for a Mac OS update that solves the issue. I told them about this thread and that it's unresolved since late 2018 and asked if I could give it back and change it for a MacBook that can actually output this resolution. They asked me where I bought it and told me to contact sales customer support of the Apple online shop and there they let me make the refund. I was really surprised but I think it depends with whom you get connected on the phone and how nice you are to them. And I think they will let you make the refund only if you bought it trough the Apple online shop.

Go to https://support.apple.com/en_US/specs

Type the names of the Macs you want to compare.

The only Macs that will support > 4096 width with a single DisplayPort output (not LG UltraFine 5K or iMac 5K Retina display) with Intel graphics are the ones that support 6K.

That means:

"Intel Iris Plus Graphics 645" (8th gen CPU; I think the tier is called "GT3e") = No

MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)

"Intel Iris Plus Graphics" (10th gen CPU with Gen11 graphics; If Apple wanted to be more specific, they could have added "G7" for the tier.) = Yes

MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)

MacBook Air (Retina, 13-inch, 2020)

Which MacBook Pro 2017 do you have? Only the two 13 inch models will have the problem. The 15 inch has AMD graphics so it will not have the problem. Since you have left and right ports, you probably have the model "MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)".

EDID modification for RGB fix is only needed for HDMI. Are you not using USB-C/DisplayPort?

The Dell display is not a Thunderbolt display, so of course it does not appear in the Thunderbolt section of System Report.../System Information.app. The USB hub of the display and the USB devices connected to the USB hub should appear in the USB section of System Information.app. The ports on the MacBook Pro are Thunderbolt, but the Dell has a USB-C port, not a Thunderbolt port. The cable is USB-C, not Thunderbolt (but it might work with Thunderbolt devices at 20 Gbps?)

The native resolution works because you were running Big Sur. Not because you changed the port. If there is really a difference in the MacBook Pro Thunderbolt ports, then maybe the AGDCDiagnose command can tell you the difference (except it doesn't provide as much info for Intel as it does for AMD). Are you using the same port on the display for each test? The USB-C port of the display, correct? You should test all four Thunderbolt 3 ports.

Consider posting your Big Sur findings/info/tests at

https://forums.macrumors.com/threads/intel-graphics-and-5120x1440-testing-in-big-sur.2244174/