It is easy to confuse bad display resolution issue with the This thread are the exact the same issue that we are all discussing I'm not sure if the problems that Katie and some others are reporting in The command copies what's in the RubyScript folder to the other folder you should see the RubyScript folder there (see info below) copy the folder to '/System/Library/Displays/Overrides' via sudo cp -R run script (folder gets created at your current location: -> type pwd close lid so that you see the external monitor screen only You probably need an external keyboard, right. To copy the folder to a certain place (command line in terminal). I suspect that > I will need an external keyboard and mouse for this to work for the next > step as I obviously cannot type anything with the macbook lid closed? > Could someone take a dummy through the procedure in simple steps? > Thankyou I > eventually found out how to 'open terminal' but when I did enter the > 'ruby patch-edid.rb' into the terminal nothing happened. > I apologise, but I have absolutely no programming experience. Katie wrote: > Hi, > I have had the same issue as everyone else with my new Macbook Air > connected via HDMI to a LG E2260 monitor. I will be very appreciate to you if you could help to fix it in 'ioreg Should i put this script file in some specific folder? Probably I am doing something wrong with typing in terminal window. Than to wake it up with keyboard, but still the terminal command to run Script with only external display connected: switch it to sleeping mode, I have tryed all ways to switch off my macbook display and run this UPDATE: attached file contains fix for U2713HM as well. removed CEA extension block (may not be necessary disables audio The files won't work, but in principle the solution is the same. For other monitors with the same problem, U2713H and U2713HM just extract it and move the contained folder into The specification in the Wikipedia article), and creating a displayĬonfig override file for OS X.

This can be doneīy reading the EDID with 'ioreg -l', modifying the offending bits (see Order to tell OS X that the display only supports RGB. The problem can be solved by overriding the EDID data of the display That the DisplayPort uses YCbCr colors instead of RGB to drive theĭisplay, which limits the range of colors and apparently causes theĭisplay to apply some undesired post processing. ) look really bad whenĬonnected to a Mac (OS X 10.8.2) via DisplayPort, as if some sharpening *UPDATE*: see here for a universal fix that works for all monitors:

Dell u2414h driver for mac