How to display 2560x1080 on external monitor from MBP or MBA?

That's not correct. What you've listed are the resolutions supported on the built-in display. If you want to know what you can connect to it, it's further down the list. Here it is for your early-2015 model:

Graphics and Video Support

• Intel HD Graphics 6000
• Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on an external display, both at millions of colors
• Thunderbolt digital video output
  • Native Mini DisplayPort output
  • DVI output using Mini DisplayPort to DVI Adapter (sold separately)
  • VGA output using Mini DisplayPort to VGA Adapter (sold separately)
  • Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately)
  • HDMI audio and video output using third-party Mini DisplayPort to HDMI Adapter (sold separately)

AFAIK you can only use up to a 2560x1440 res on an external monitor on a MBP.

That's the resolution I use for my 27" external monitor - and the highest resolution that I see under SwitchResX (although you may want to try tinkering with the settings using SwitchResX...).

Good luck,

Clinton

I had the same monitor LG 29EA93 and the only way I could get it to work was the older version of SwitchResX 3.8.6.

Using new macmini the best I could do was 2560x1080 @ 52Hz. Took a lot of tinkering with the setting but you just can't seam to get the full 60Hz otherwise screen goes out of range and you get a black screen. Even getting it to 52Hz was a struggle was easier sticking to 51Hz. Just go to custom setting hit + and change the bottom right Vertical Scan rate to 51Hz.

Sent the monitor back as it had over 22 stuck pixels, hoping that during this week’s CES they will finally release this monitor to the USA as the rest of the world have had it for months. Hopefully their quality control has also improved after all LG supply the Thunderbolt LED's to Apple with zero stuck pixels least they could do is the same when purchased direct.

Has anybody else had any luck with this? I have a Vizio CinemaWide with 2560 x 1080 native, and I can't seem to accomplish the native resolution using SwitchResX on a MBP 17 Late 2011.

Hi there guys, I think I came up with a solution 😉

It's been configured with the last version of "Switch Res X"

I tried that with the latest SwitchResX (4.3.4), but it reports "Not installed" in the status, even after rebooting. Did you actually get this to work with a similar monitor?

It worked perfect for me. Maybe settings should be different for your laptops. In my case I'm using a MBP 15" with a GeForce 330M.

The monitor I have is the LG 29EA93 (21:9) @ 2560 x 1080.

Make sure you have exactly same values in Switch Res X. Special attention to "Scan rate".

You can see in the capture below that it's working 😉

and, just in case, here you have the settings that worked for me 😉

It might be also different for each video card...

Greetings!!

Well, the lastest version of SwitchResX works. all you need to do is following the screenshot above, but to change the 'Scale to' - > 'Vertical' to a number that defines the 'Pixel clock' to 159.84. you need to try the number around 41.XX-43.XX, then tab out of the box, and check. each video card in different pc/mac is different. trial and error is needed.

In my case, all these mess came up due to the connector I was using (mini displayport to DVI). Now that I'm directly using mini displayport to displayport cable, native resolution is perfectly supported (no app such as SwitchResX is needed).

FYI: This is a link to a similar cable

Glad you guys found a solution! No joy here, unfortunately. My monitor (a TV) doesn't have a displayport input. Just several HDMI and a VGA.