Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

2560x1440 resolution no longer available on external display

Hi,


since OS X 10.8.4 Mountain Lion update and now also Maverick update, I can no longer select the 2560x1440 resolution to my

external Dell U2711 display. 1080p is the highest availible resolution now.


I have a 15" Macbook pro retina 2012 and use a mini displayport to displayport cable to connect to my Dell U2711 display.


Is it a cable issue or what is the problem? (the cable worked great with full 2560x1440 resolution up until 10.8.4)



Best regards

Jørgen

Denmark

MacBook Pro with Retina display, OS X Mavericks (10.9)

Posted on Oct 26, 2013 2:05 AM

Reply
17 replies

Jul 8, 2014 9:27 PM in response to LitzD

LitzD wrote:


I have two ASUS PB278 which I connected with HDMI originally (1080p was best option), and switched to a mini-display port to display port connection, and resetting the PRAM worked for me! Thanks!


One thing to note is after I restarted and reset the PRAM, even though I could select 2560x1440, I had to also turn the monitors off then back on (they had some artifact lines being drawn before doing this).


I just wanted to thank all of you for the help I got by reading your posts.


I have just installed two ASUS PB278Q monitors on my MacBook Pro 15-in Retina, and they are working very well.


My setup:

  • MacBook Pro 15-in Retina (early 2013)
  • OS X Mavericks 10.9.4
  • 2 ASUS PB278Q monitors purchased from B&H within the last month
  • StarTech MiniDisplayPort (MDP) to DisplayPort (DP) 10-ft cable from StarTech.com (purchased on Amazon.com)
  • One monitor is daisy-changed through a LaCie Thunderbolt drive, and the second is directed to one of my two Thunderbolt ports on my MBA-15R.

I didn't really have any trouble installing these monitors at the max resolution of 2560x1440. The first monitor I installed, I did have to turn it off/on to see the "Scaled Resolution" of 2560x1440. The second monitor, installed today, came up in the max res without any effort on my part.


I installed the first monitor under Mt. Lion, and then after upgrade to Mavericks, I installed the second monitor.


If you are having problems achieving the max res of 2560x1440, I encourage you to keep trying, read all of the posts on this forum. It CAN be done!


I highly recommend both B&H Photo/Video as a vendor and StarTech.com products. I use both B&H and Amazon.com a lot.

2560x1440 resolution no longer available on external display

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.