Mac Mini 2018 and LG 49WL95C-W 49-Inch Curved 32: 9 Ultrawide

make sure you use a Thunderbolt 3 cable to be on the safe side! USB-C cables come in different flavours (the cheapest are USB 2 specs)!

In the last few days LG has released some updated software for this display. Maybe it will help.

http://gscs-b2c.lge.com/downloadFile?fileId=cCNX894DsHjqxFfyS68Pg

http://gscs-b2c.lge.com/downloadFile?fileId=tZUjIlaZXB4k12pcp3PA

Seconded. I have a dell 49" monitor, with a mac mini and its the same issue. A work around for now is to use PBP to make the screen think its 2x 27, then you can have a vertical resolution of 1440. The downside is the split down the middle of the screen (not bezel but just the break in the screen). Does anyone know how we will be updated when this is actually resolved by apple? Thank you

I'm finally get this HI RES with external GPU

buying this

https://www.amazon.com/gp/product/B079RMJDN4/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

and this

https://www.amazon.com/gp/product/B06ZZ6FMF8/ref=ppx_yo_dt_b_asin_title_o04_s01?ie=UTF8&psc=1

assemble it all according manual and we have desirable 5k

Connection Type: DisplayPort

I am now capable to confirm that eGPU

I completely agree. If you load Window 10 on the new Mac Mini it can run the display at 5120x1440 so the issue is display drivers within O SX that Ned to be fixed. It should not require more hardware to be purchased to support any of these current ultra wide 32:9 displays on the market...

I have the EGPU working with my new Mac mini. I purchased a GPU https://www.newegg.com/sapphire-radeon-rx-580-100411p8gocl/p/N82E16814202278?Item=N82E16814202278&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_-

and a Thunderbolt 3 EGPU Case https://www.bhphotovideo.com/c/product/1445133-REG/razer_rc21_01310100_r3u1_core_x_external_graphics.html

This is working great with this monitor. I hope that helps.

Thank you for reporting, I have the same issue with you.

It might not be the best solution, but SwitchResX can force the resolution to be 5120 x 1440 (please take a look at the screenshot below). Since what it does is just to scale the 3840 x 1080 resolution into a fake 5120 x 1440, all the UI and text will be much smaller but meanwhile very blurry.

Wish it's a software problem and Apple will solve it soon with a MacOS update.

Lots of monitor updates on 6/20:

https://www.lg.com/us/support/software-firmware-drivers?customerModelCode=49WL95C-W&csSalesCode=49WL95C-W.AEU&category=CT10000030&subcategory=

Load all that apply and see if it changes the problem? Good luck.

I haven't heard of any fixes or seen any updates from apple to address the problem. I think it's just due to the nature of the monitor being 49 inches wide, that the OS has no support for that resolution at the moment. I was in the same boat in prior to buying the monitor, apples own Q&A stated that the Mac mini should support 5120x2880. When I bought the monitor, I was definitely surprised and bummed out that it was not true.

I remember reading somewhere the apple actually had an update for this monitor: LG 34BK95U-W UltraFine 34, a monitor that apple is also selling on their store website I believe. This monitor has a resolution capable of 5120 x 2880 at 34 inches. My guess that's where the "5120 x 2880" support is at that monitor size.

Cable wise, it didn't really matter. I bought various thunderbolt 3 cables, even the apple official one. No changes at all. So the cable is not a factor.

How are you connected to the Mac? According to the Video support specs with USB-C to DisplayPort the native DisplayPort is supported.

Are you going direct usb-c to DisplayPort or are you using HDMI? And are you using any converters/dongles or straight cabling in-out?

I purchased Samsung C49RG90 49inches ultrawide 32:9 monitor too. I've been tried many attempts regarding cables. I used DP to USB-C at a first time to Mac mini 2018 with intel HD graphics; however it did not work for target resolution 5120x1440. So I assumed that will caused by cable either GPU issues. Therefore I maintained my 3rd party DP to USB-C cable (4k@60Hz) and switch device to Macbook pro 15 inches 2016 but it did not work at all. After that I purchased Moshi cable that supports Thunderbolt 3 to DP and I connected to the macbook and it did work for 5120x1440 with low resolution mode (60Hz). However, the tech specs of Mac mini 2018 that supports 1 5k monitor by Thunderbolt3.

I guess this should be matter of gpu or Macos issues not the cable. I wish this will be reported and resolved by Apple tech team. I'm still debating that I should compose eGPU to my system.

Take a look on my post (currently it is the latest one there - I am now capable to confirm that eGPU works perfectly. Here is the link: https://discussions.apple.com/thread/250885574?answerId=251975225022#251975225022

Interesting timing, MoneySnap. I've been following this thread for a couple of weeks, since I got my Mac Mini and 49" Samsung and had similar troubles. Today I came in here and saw your solution, as I was just about to post almost the same thing!

I finally got 5K working on my Mac Mini and 49" Samsung C49RG90SSNXZA, with almost the same solution. I also picked up the Razer Core X Chroma, and I also put in a Sapphire Pulse card, though I went with the Radeon RX 5700 XT. Same as you, everything was essentially plug and play.

Nice crisp and clear picture. Expensive solution, though I will have other uses for the eGPU, and I think worth it overall in the end.

Yeah i think its a bug in the new OS, it is super daft:

See https://discussions.apple.com/thread/250737077

Re the Mac mini, I don’t know if its due to the onboard graphics chip specifically.. Is the Graphics on the MacBook Pro making the difference? i.e. with High Sierra on a 2018/20 Mac mini could it work?

Or is an eGPU the only option for the mini..

In any case apple really needs to get a patch sorted.