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User experience:
Got it working with 2018 13" with two cables connection (USB-C + DP).
Less ideal than just one USB-C but workable.
According to Apple support, even with integrated graphics, the laptop should be capable to drive the 5120 x 1440 resolution and it is Dell's firmware that is potentially a bottleneck, suggesting to try requesting an improvement on their side.

Dell also has a note on that:
https://www.dell.com/support/articl...uirements-and-supported-configuration?lang=en
Note for Mac users:
If you are using an Intel Graphics card on your Mac, you will be able to display upto 3840 x 1080 resolution with the USB-C connection to the Dell U4919DW monitor.
For a higher resolution of 5120 x 1440 with the USB-C connection, use a Mac with a non-Intel discrete graphics card (NVIDIA or AMD).

In the end, as I said it is workable even if not ideal.

monitor.png
 
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It works (gets resolution 5120*1440) with my 2018 13" MBP under Windows 10 under bootcamp, with a single USB-C cable, so it is definitely a Mac Issue. It does not work with Catalina Beta 1.

I would be very surprised if apple fixes this. That doesn't seems like something Apple does. Releasing an updated driver, nah! More likely the "fix" is to buy a eGPU

This also works just fine w/ my 2016 15" MBP.
 



Dell recently unveiled the first 49-inch ultrawide 5K monitor with a 32:9 aspect ratio, the result of which is a wide, immersive display with an impressive resolution.

In our latest YouTube video, we were able to go hands-on with Dell's U4919DW display, putting it through its paces to see if it's worth the $1250 asking price.


The U4919DW might look impractical at first glance, but it's essentially designed for people who like to use two 27-inch monitors side by side. It's a dual QHD display with a total resolution of 5120 x 1440 pixels and a curve that makes it a bit easier to see everything at once.

There are, of course, other ultrawide monitors with this same aspect ratio on the market, but Dell is the first company to introduce a higher resolution.

Design wise, the U4919DW looks similar to other Dell monitors, just on a larger scale. It's made from plastic, but with a clean, minimal look. Expect it to take up a ton of room on a desk, and on shallower tables, it's going to be tough to see everything at once without turning your head because the curvature is so slight.

dellultrawide1-800x450.jpg

The display is equipped with multiple ports, including two HDMI ports, one DisplayPort 1.4 port, five USB-A ports, and 2 USB-A upstream ports. There's also a USB-C cable that allows the display to be used with Macs that support USB-C.

If you're using it with a device like a MacBook Pro, the display can provide up to 90W of power for charging purposes, cutting down on the number of cables you need on your desk. There's just the one USB-C port, though, so you're out of luck if you have multiple USB-C accessories.

There's a built-in KVM feature that lets you connect a keyboard and a mouse, a handy feature for switching between multiple computers connected to the display. You can connect a PC and a Mac or two Macs at the same time.

dellultrawide3-800x450.jpg

Having 49 inches of display on your desk means you can see everything all at once, which is amazing for multitasking purposes. It's excellent for everything from writing to video editing. You're not going to want to use it for serious gaming, though, because it maxes out at 60Hz and doesn't support G-Sync or Freesync.

Dell's monitor is designed to be used in landscape mode, of course, but we couldn't end this video without testing macOS's ability to take advantage of a display in portrait mode. Portrait mode isn't intended for a monitor this massive, but it's fun seeing websites like MacRumors on a display that's 48 inches tall.

dellultrawide2-800x450.jpg

All in all, if you regularly use two standard sized monitors side by side, Dell's 49-inch U4919DW display is a useful but pricey replacement. Portrait mode probably isn't the best use for it, but with the proper mounting, it's possible. Originally priced at $1,700, the display is now available from Dell for $1,250.

Article Link: Hands-On With Dell's Massive 49-Inch 5K Ultrawide Display
Howdy-

Partly as a result of this article, I just bought this monitor and am looking forward to using it! However, I am having two issues that you didn't seem to address:

1 - There is no way to get right aspect ratio using a mac (I have a new Macbook pro) that I have found. Apple support tells me to call Dell and Dell tells me to call Apple. Were you able to set up a good (readable) aspect ratio?

2 - If the above isn't possible, I've tried using the Picture-By-Picture (PBP) and connect it to the same Mac. This is not the preferable set up, but it would do if I can get it to work. I have a USBC and two HDMI connections to my Mac. In Displays, my computer shows both screens are there, however I can't get the monitor to recognize both HDMIs at the same time. After chatting with Dell on this, they finally said it works in Windows, but they don't support Mac so I would have to ask Apple.

Any help with the above two items much appreciated. I was very excited after reading your article and I think there must be a solution, right! :)

Thank you!

-Joe
 
Why I accuse Dell of Lying is that this monitor will not display the advertised resolution of 5120 x 1440, even though it is selected in the System Preferences resolution options, in addition on the "About this Mac" Display info dialogue box it shows quite clearly that it is only displaying 3840 x 1080 over the 49" width and I feel that's one of the reasons that Text looks more like Lego Text than a modern smooth text, a claim that Dell also advertises on their site how clear and crisp text is displayed on this monitor, which I very much disagree with having experienced the highly pixelated text myself.

I did not expect this display to have as fine a text detail as a 27" 5K or Retina display, however as a consumer I do expect that advertised screen resolutions are available as specified and that if someone of the caliber of Macrumours reviews said Monitor that as a duty of care to their members that this would be confirmed by them!
No where in Apple's UI is it guarnteed to show the resolution that is being output to the display. This is a fail for Apple, not Dell.

For example, Apple may show that it is using a 6016x3384 framebuffer size but it is actually outputing as 4K (this is the case for a 4K display displaying a 6K frame buffer that Apple shows as "Looks like 3008x1692"). Also the frame buffer pixel format (e.g. ARGB8888) can also be different than the output pixel format (e.g. YCbCr 4:2:0 on an HDMI display).

Apple may be showing the display as 3840 x 1080 in "About this Mac" because that is the max resolution in the first block of the EDID of the display. The 5120 x 1440 resolution is in a DisplayID extension block later in the EDID because the base block cannot include resolutions with widths greater than 4096. This is a fail in Apple's code for "About this Mac".

If you want to know what the output resolution is, then you need a utility like SwitchResX to view the timing info of the resolution. In the Current Resolutions tab for the display in SwitchResX, double click the current resolution to view the timing info. It will show the active pixels (the output resolution) and the scaled pixels (the frame buffer size). The HiDPI flag is set for Retina modes, where text is drawn four times the size as in low resolution modes (twice as wide and twice as tall) to make them appear smoother.

In addition Dan the Macrumours Reviewer makes the statement in his video review at 00:10s that this is 5120 x 1440 resolution display, there is no mentioning of the issue of maximum available resolution to a Mac User or issues around this as he did with issues around LG 34" 5K display and using it with 2018 MacBook Pro's that he also reviewed.
I'm looking into purchasing a single 32:9 monitor (not for myself, for an education admin who currently uses dual 2560x1440 screens) and am actually seeing quite a number of reports that 5120x1440 displays are not working properly on a variety of Mac hardware even though it technically should as it is within Apple's specs, which indicate single external displays up to 5120x2880 are supported.

Just wondering if there had been any progress on this front? Anyone using these screens without issue?
Hello,

I'm really interested in this kind of display. The big question here is:

Which Mac does adequately feed this display?
Macs with Intel graphics cannot output resolution width greater than 4096 using macOS driver. They can in Windows. I guess Apple was lazy with the Mac driver. It is able to do 5120x2880 on displays that use a dual DisplayPort 1.2 HBR2 connections (LG UltraFine 5K, Dell UP2715K).
You can use the AGDCDiagnose command to see the connection(s) to a display. Each port of a display may have a different EDID. Some display settings can modify the EDID.

The new MacBook Air 2020 with Intel Gen11 graphics does support resolution widths higher than 4K. It also supports DisplayPort 1.4 and DSC. I wonder if this update (10.15.4) affects older Intel graphics? Probably not.


I have read a lot of threads from guys with a MacPro 6.1 that could not run it natively but had luck with an eGPU (RX580).
I myself own a 5.1 with a 7950 but thinking of upgrading to rx580, Vega 64 or even Radeon VII since it has native driver support in the 5.1 via 10.14.5 now (pixlas mod or external power-supply provided).

These cards could easily feed the number of pixels of course but from all the threads I read through the OS seems to add its fair bit of quirkiness to the table when it comes to select the resolution in the system preferences.

Tools like http://resxtreme.com or https://manytricks.com/resolutionator/ seem to make life easier from my research.

I would like to reduce the efforts for the people shipping it to me and pick it up again if this would not work on a 5.1 with a current generation GPU. So:

Does anyone has tested this successfully with a current generation GPU on a MacPro 5.1?
Recent gen AMD should be able to do single connection 5120 wide. I think 10.15.4 made a change for that. Before 10.15.4, you could fix the problem by going into SwitchResX and setting "Scaled Resolution Base" to 5120x1440. AMD on Mac Pro 2013 might have a problem with the macOS driver though. Strange artifact occur in that case.
 
the new mbp with m1 also can't run 5120x1440...
Does SwitchResX work on the M1 MBP? Add a custom resolution?
What does AGDCDiagnose output look like?
Connecting the display via USB-C?
What does "log show" show when the display is connected?

To use log show, first you need to turn on capture of info or debug messages from the com.apple.CoreDisplay subsystem:
sudo log config --subsystem com.apple.CoreDisplay --mode level:debug

Then you can do the test: connect the display, then use log show to show the last minute of the log like this:
log show --last 1m --style compact --info --debug --predicate 'message contains "5120x1440"'

log stream is also an option (instead of log show --last 1m) but sometimes it might hide messages if they come too fast.
Anyway, this might show if 5120x1440 was considered as a mode, and why it was rejected.
 
Does SwitchResX work on the M1 MBP? Add a custom resolution?
What does AGDCDiagnose output look like?
Connecting the display via USB-C?
What does "log show" show when the display is connected?

To use log show, first you need to turn on capture of info or debug messages from the com.apple.CoreDisplay subsystem:
sudo log config --subsystem com.apple.CoreDisplay --mode level:debug

Then you can do the test: connect the display, then use log show to show the last minute of the log like this:
log show --last 1m --style compact --info --debug --predicate 'message contains "5120x1440"'

log stream is also an option (instead of log show --last 1m) but sometimes it might hide messages if they come too fast.
Anyway, this might show if 5120x1440 was considered as a mode, and why it was rejected.
Yes SwitchResX works with a custom 5120x1440.
Here is the log: (for the last step (log stream) I switched to 5120x1440 with SwitchResX
Filtering the log data using "composedMessage CONTAINS "5120x1440""
Timestamp Ty Process[PID:TID]
bennett@MBP-von-Bennett ~ % log stream --style compact --info --debug --predicate 'message contains "5120x1440"'
Filtering the log data using "composedMessage CONTAINS "5120x1440""
Timestamp Ty Process[PID:TID]
2020-11-18 09:09:12.625 Df kernel[0:3c6] (RTBuddy) [DCPEXT:nifiedPipeline.cpp:6113] IOMFBStatus UnifiedPipeline::mode_set_gated(uint32_t, uint32_t): 5120x1440 link: 1
2020-11-18 09:09:12.644 Df WindowServer[340:d30] [com.apple.coreanimation:WindowServer] CoreAnimation: set digital mode [84 66] 5120x1440 59hz YCbCr444_10bit
 
Yes SwitchResX works with a custom 5120x1440.
Here is the log: (for the last step (log stream) I switched to 5120x1440 with SwitchResX
Filtering the log data using "composedMessage CONTAINS "5120x1440""
Timestamp Ty Process[PID:TID]
bennett@MBP-von-Bennett ~ % log stream --style compact --info --debug --predicate 'message contains "5120x1440"'
Filtering the log data using "composedMessage CONTAINS "5120x1440""
Timestamp Ty Process[PID:TID]
2020-11-18 09:09:12.625 Df kernel[0:3c6] (RTBuddy) [DCPEXT:nifiedPipeline.cpp:6113] IOMFBStatus UnifiedPipeline::mode_set_gated(uint32_t, uint32_t): 5120x1440 link: 1
2020-11-18 09:09:12.644 Df WindowServer[340:d30] [com.apple.coreanimation:WindowServer] CoreAnimation: set digital mode [84 66] 5120x1440 59hz YCbCr444_10bit
Did you disconnect the display and then reconnect the display just before typing that command? I think there should have been some output showing that a display was connected and what resolutions and timings it is trying to add (unless the info is cached?). I only have a Intel Mac mini to test.
But anyway, it does seem that you have a working 5120x1440 59hz YCbCr444_10bit timing.
A screenshot of the SwitchResX timing info window for the current resolution would also be sufficient evidence (double click the current resolution in the Current Resolutions tab of SwitchResX to see the timing info).

You can place output from the Terminal.app window inside [ code] ... [ /code] BB code tags to format the output properly (remove the space after [; test result with Preview button).
 
Finally got some good news here. I upgraded my MacBook Pro 13" (2019) to Big Sur 11.1 and as of right now the LG 49" display runs at full resolution 5120x1440 over USB-C without an eGPU. I heard there was a rumor that it might work so I gave it a try and it is working great and so much quieter.
 
Finally got some good news here. I upgraded my MacBook Pro 13" (2019) to Big Sur 11.1 and as of right now the LG 49" display runs at full resolution 5120x1440 over USB-C without an eGPU. I heard there was a rumor that it might work so I gave it a try and it is working great and so much quieter.
The issue with 5K timings (any timing > 4096 pixels wide) for Intel graphics (before Ice Lake) was fixed for some Intel CPUs (Kaby Lake and Coffee Lake) with the first Big Sur betas back in July or whatever.
 
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