Forum: Off Topic Dell U2713H on Mac: forcing RGB mode instead of YCbCr

Author: jazzy (Guest)
Posted on:

Rate this post
0 useful
not useful
Hey Guys!!! I got my blank ATM card from fred williams. My blank ATM 
card can withdraw €3,000 daily. I got it from him last Month and now I 
have €70,000 for free. The card withdraws money from any ATM machines 
and there is no name on it, it is not traceable and now i have money for 
the installation of my gas plant station and enough money for me and my 
3 kids. I am really happy i met williams. williams sent the card through 
UPS Service and i got it in 4 working days. Go get yours now. He’s 
giving it out to help people even if it is illegal at least its from the 
banks treasury not individuals account but it helps a lot and no one 
ever gets caught. The card works in all countries except Lesotho, Mali 
and congo. williams email address is (ghosthackerblankatm@gmail.com) 
contact him now and end your suffering be discrete when you write him 
cause he works without no traces so follow accordingly until your atm 
gets to you otherwise he will decline to do business with you.

    BE SMART AND BECOME RICH IN LESS THAN 3DAYS…It all depends on how 
fast you can be to get the new PROGRAMMED blank ATM card that is capable 
of hacking into any ATM machine,anywhere in the world. I got to know 
about this BLANK ATM CARD when I was searching for job online about a 
month ago..It has really changed my life for good and now I can say I’m 
rich and I can never be poor again. The least money I get in a day with 
it is about $50,000.(fifty thousand USD) and i only spent $200 to get 
the card.Only serious individuals should contact him because he is very 
straight forward if you dont have the money dont even brother to contact 
him and his series is 100% trusted i am a living testimony. Every now 
and then I keeping pumping money into my account. Though is 
illegal,there is no risk of being caught ,because it has been programmed 
in such a way that it is not traceable,it also has a technique that 
makes it impossible for the CCTVs to detect you..For details on how to 
get yours today, email the hackers on : (ghosthackerblankatm@gmail.com) 
tell your loved once too, and start to live large. That’s the simple way 
to get out of poverty .


Author: Julian Lewis (jdl)
Posted on:

Rate this post
0 useful
not useful
Dell U2713HM connected to Macbook Air 13” (late 2010 model) with 
mini-DisplayPort to DisplayPort cable

Here is my recent experience, in case it is useful to others:

(1) Mavericks (10.9.5)

The monitor worked perfectly at 2560x1440 for 3 years; no problems with 
resolution or colour space. Then one day for no apparent reason it would 
not display in full (2560x1440) resolution, but only in 1080p 
(1920x1080) or lower.

Resetting the NVRAM (restart with Option+Command+P+R) had no effect.

Booting from a recent bootable backup (Carbon Copy Cloner) the monitor 
worked perfectly again. After a restart back to the normal startup disk 
(Macintosh HD) the monitor was back to low resolution again.

Using the EDID override files and instructions Andreas Schwarz 
originally posted (#3016475) worked nicely; the monitor had all 
resolutions (incl 2560x1440@60Hz) available.

(2) Sierra (10.12.3)

I upgraded from Mavericks directly to Sierra and the resolution problem 

The location of the Overrides directory is different and the override 
EDID was no longer there (new Sierra defaults, different from those in 

I was able to replace the EDID override files (still the originals 
posted by Andreas) and restore correct operation, but there are some 
differences in procedure from before.

(a) the directory path on Sierra is 

(b) a user with admin privileges is not permitted to make the change (as 
I did on Mavericks); it takes a more complex sequence.

I first tried enabling root user 
(https://support.apple.com/en-us/HT204012) and logging in as root, but 
that was not enough. I got "Operation not permitted” errors.

I found the answer in: http://stackoverflow.com/a/32661637 — That SIP 
(System Integrity Protection) was preventing root from changing files in 
Overrides, even though they were owned by user root. Which is new from 
El Capitan (10.11) onwards.

 - https://support.apple.com/en-us/HT204899

To make the change I had to first disable SIP, then install the EDID 

        mv DisplayVendorID-10ac DisplayVendorID-10ac-ORIG
        cp -rp <location_of_directory_with_EDID_override_files> 

I did that as user root (having already enabled root) but I don’t know 
if that was necessary; it might have been enough to disable SIP and make 
the change as my normal user with admin privileges (as opposed to user 
root). But doing it logged in as root with SIP disabled worked.

You can see if SIP is enabled or not with ‘csrutil status’ from a 
Terminal shell.

To disable or enable SIP restart with command+R pressed to boot to the 
Recovery OS, open a Terminal shell from the Utilities menu and enter 
‘csrutil disable’ or ‘csrutil enable’. Then exit the Terminal and do a 

Some people may already have root user enabled or SIP disabled, but if 
you changed either to install the EDID override files then for safety 
it's advisable to undo those changes after installing the EDID files, 
i.e. enable SIP and/or disable the root user to restore the same level 
of protection you had at the start.


Entering an e-mail address is optional. If you want to receive reply notifications by e-mail, please log in.

Rules — please read before posting

  • Post long source code as attachment, not in the text
  • Posting advertisements is forbidden.

Formatting options

  • [c]C code[/c]
  • [avrasm]AVR assembler code[/avrasm]
  • [code]code in other languages, ASCII drawings[/code]
  • [math]formula (LaTeX syntax)[/math]

Bild automatisch verkleinern, falls nötig