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help with dual monitor setup

5106 Views 10 Replies Latest reply: Nov 30, 2009 7:13 PM by snaps98 RSS
bronte7 Calculating status...
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Sep 7, 2009 7:15 PM
i just purchased 2 Dell S2009W 20-inch HD flat panel monitors for use with my september 2007 macbook.
I have found many answers on how to setup dual screens with the macbook screen being one of them, but i am still not entirely clear on how to utilize the three screens that i will have at once. It must require a mini DVI splitter or something, but im just looking for a solid answer

Thanks
macbook 2.16 GHz Core 2 Duo, Mac OS X (10.5.6)
  • kenmai Calculating status...
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    Sep 7, 2009 7:30 PM (in response to bronte7)
    You can't run dual external screens from a Macbook very easily (or very well). The Macbook can only really drive a single external screen. You can trick it into driving two with something like the Matrox DualHead2Go (or TripleHead2Go), but the mini DVI out of the Macbook has limited resolution (can only drive out single link DVI, max 1920x1200), so you won't be able to drive the external screen at full resolution. If you had a mini DisplayPort out (e.g. from a Macbook Pro), you could drive both screens at max resolution.

    I'm assuming you want to run in extended desktop mode not mirroring. If you want to mirror, you just need a DVI splitter box (powered, not just a simple cable).

    Message was edited by: kenmai
  • Malcolm Rayfield Level 7 Level 7 (28,070 points)
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    Sep 7, 2009 8:44 PM (in response to bronte7)
    You could use a USB to DVI converter for the third display, but its performance will be limited.
    <http://www.gefen.com/kvm/dproduct.jsp?prod_id=4517>
    Mac Pro (Early 2008), Mac OS X (10.6), iPhone 3GS 3.0.1
  • kenmai Level 1 Level 1 (35 points)
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    Sep 8, 2009 8:31 AM (in response to bronte7)
    Yes. The mini DVI can do up to 1920x1200. The only thing it can't handle is a 30" screen.
  • merrieux Calculating status...
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    Sep 11, 2009 9:17 PM (in response to Malcolm Rayfield)
    would this also solve a dual screen issue with a G5? the old connectors are discontinued. and i can't spend $325 on one.
    g5
  • Malcolm Rayfield Level 7 Level 7 (28,070 points)
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    Sep 12, 2009 12:22 AM (in response to merrieux)
    would this also solve a dual screen issue with a G5? the old connectors are discontinued. and i can't spend $325 on one.

    The USB to DVI adapter is a last resort. Its resolution is limited, it is slow, and needs special drivers, which are probably Intel only, so may not be available for a G5.
    What $325 adapter do you need? ADC adapters are a lot cheaper than that.

    ADC to DVI
    <http://www.smalldog.com/product/12651830>

    ADC to VGA
    <http://www.tamayatech.com/parts.php?i=MCAADCVGA>
    Mac Pro (Early 2008), Mac OS X (10.6), iPhone 3GS 3.1
  • merrieux Level 1 Level 1 (0 points)
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    Sep 12, 2009 7:14 AM (in response to Malcolm Rayfield)
    I purchased the belkin adapter that goes from the 2nd monitor outlet on the G5 but the distal end of that does not attach to the cable that came with the 2nd monitor...it's a DVI, I think, rhomboid shaped blue...it seems there is another cable needed.
    I went to the 2nd tamayatech but can't see it - just lists the parts - the problem is that from the distal end of the first connector, nothing fits -
    g5
  • Malcolm Rayfield Level 7 Level 7 (28,070 points)
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    Sep 12, 2009 8:03 AM (in response to merrieux)
    If the 2nd display is a digital LCD, it should work with the ADC to DVI adapter. The adapter uses a DVI-D connector, which does not have pins for analog video signals. A digital display doesn't need those signals, but they might use a DVi-I plug, which has pins for both analog and digital video signals. A DVi-I plug won't fit a DVI=D socket. If the display's cable is removable, replace it with a DVI-D cable. If not, you will need a DVi_I (F) to DVI-D (M) adapter (in addition to the ADC to DVI adapter).
    <http://www.amazon.com/Adapter-DVI-D-Male-DVI-I-Female/dp/B000A8QJGG>
    <http://www.newegg.com/Product/Product.aspx?Item=N82E16812214016&nmmc=OTC-Froogle&cm_mmc=OTC-Froogle-_-Adaptersand+genderchangers-_-LINKSKEY--12214016>
    Mac Pro (Early 2008), Mac OS X (10.6), iPhone 3GS 3.1
  • snaps98 Calculating status...
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    Nov 30, 2009 7:13 PM (in response to Malcolm Rayfield)
    I have a simmilar problem. Is it possible to have dual output of my mac using component and composite video? I am using my mac the play videos but my the tv displays are component and some are composite so i need both out video formats? Is this possible from mac? what do i need to purchase to make it happen? do i need any converters?

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