oatcracker

Q: can iMac (21.5-inch 2009) connect to Dell U2715H

May I ask if the iMac (21.5-inch, 2009) is able to connect to the latest Dell U2715H monitor (2560x1440) using the mini-displayport to displayport cable come with the monitor and use the full resolution of U2715H?

 

I.e.

1. the mini-displayport end of the cable is connected to the iMac's mini-displayport and

2. the displayport end of the cable is connected to the U2715H monitor's displayport.

 

Thanks!

iMac (21.5-inch Late 2009), OS X Mavericks (10.9.4)

Posted on Nov 13, 2014 5:40 AM

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Q: can iMac (21.5-inch 2009) connect to Dell U2715H

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  • by rkaufmann87,

    rkaufmann87 rkaufmann87 Nov 13, 2014 5:55 AM in response to oatcracker
    Level 9 (58,746 points)
    Photos for Mac
    Nov 13, 2014 5:55 AM in response to oatcracker

    The short answer is no, please read Apple's FAQ on Target Display Mode where Apples advises only 2009/2010 27" iMacs have TDM capability.

     

    Target Display Mode: Frequently Asked Questions (FAQ)

  • by oatcracker,

    oatcracker oatcracker Nov 13, 2014 5:59 AM in response to rkaufmann87
    Level 1 (5 points)
    Windows Software
    Nov 13, 2014 5:59 AM in response to rkaufmann87

    Thanks, rkaufmann87!  I don't mean to use the iMac as a display monitor. I just want to connect it to the dell monitor which will be an extended display for the iMac. Hope this clarifies.

  • by rkaufmann87,

    rkaufmann87 rkaufmann87 Nov 13, 2014 6:37 AM in response to oatcracker
    Level 9 (58,746 points)
    Photos for Mac
    Nov 13, 2014 6:37 AM in response to oatcracker

    Sorry, still a no.

  • by domudem,

    domudem domudem Apr 10, 2015 11:30 AM in response to oatcracker
    Level 1 (1 points)
    Apr 10, 2015 11:30 AM in response to oatcracker

    Hi OatCracker,
    I have the same issue as you did with the Dell U2715H and was wondering if you ever found a solution.

     

    Thanks,

    Dom

  • by oatcracker,

    oatcracker oatcracker Apr 11, 2015 10:06 PM in response to domudem
    Level 1 (5 points)
    Windows Software
    Apr 11, 2015 10:06 PM in response to domudem

    Hi, I did get the Dell U2715H connected with my iMac using the mini-displayport to displayport cable come with the monitor.

     

    It works sometimes and it doesn't, and it's like a hit or miss scenario. But generally, once I got them connected and running, it will work for a while unless you have a sudden power shown down, and in that case I found that leaving the monitor there unplugged and unconnected for several hours or overnight will get it back again the next time it is connected with iMac

     

    Unfortunately, my iMac is down due to failed logic board after a sudden power outrage (you may think it happens a lot here... ), and now I only have my macbook pro 15inch connected to the Dell monitor, and sadly, the monitor works in the bootcamp windows 7 installed on my macbook pro, and not in the OS X mode...

     

    So, I really don't know the trick to get the dell monitor work perfectly with Mac ...

     

    Hope this helps...

  • by Rudegar,

    Rudegar Rudegar Apr 12, 2015 5:35 AM in response to oatcracker
    Level 7 (28,734 points)
    Apple TV
    Apr 12, 2015 5:35 AM in response to oatcracker

    used to extend my 21" imac with a dell g2410 using a tb->dvi dongle worked great since then I gave the dell to my wife to use with her macbook pro

    and use an Asus vg27A as my main monitor and the imac's 21" screen is second

    all monitors running 1080p

     

    my imac is mid 2011

  • by domudem,

    domudem domudem Apr 13, 2015 9:48 AM in response to oatcracker
    Level 1 (1 points)
    Apr 13, 2015 9:48 AM in response to oatcracker

    Hi Oatcracker,

    Thanks, I'll try it again here and there but I have had no luck so far on my MacBook 2009. It's too bad because I bought that screen to use it in WQHD with the MacBook (I putted a SSD in it and it runs as fast as a new Mac). 

     

    From what I found, it's a faulty EDID (which is a simple code) that generates the problem and Dell offers absolutely no support on the matter, which is too bad. Would have known, I would have purchased a Cinema Display instead.

     

    Good luck with your iMac.

     

    Dom

  • by oatcracker,

    oatcracker oatcracker Apr 17, 2015 6:18 AM in response to domudem
    Level 1 (5 points)
    Windows Software
    Apr 17, 2015 6:18 AM in response to domudem

    BTW, guys, forgot to mention that the Macbook Pro or Macbook Air connected with Dell U2715H via the mini-displayport to displayport cable using the thunderbolt port on Mac will lose the speaker, i.e. no sound ... !

     

    Don't know why ...

  • by Rudegar,Helpful

    Rudegar Rudegar Apr 17, 2015 7:41 AM in response to oatcracker
    Level 7 (28,734 points)
    Apple TV
    Apr 17, 2015 7:41 AM in response to oatcracker

    displayport don't carry audio

  • by oatcracker,

    oatcracker oatcracker Apr 17, 2015 7:41 AM in response to Rudegar
    Level 1 (5 points)
    Windows Software
    Apr 17, 2015 7:41 AM in response to Rudegar

    ... what a pity ...