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  1. #1


    Member Since
    Jul 24, 2012
    Posts
    50
    Specs:
    iPhone 4s | iPad 2 | 21.5" iMac 2.7GHz 1TB
    Connecting external monitor
    I am trying to connect an external monitor to my iMac. The external monitor is a few years old and has a VGA which goes into a DVI which then went into my old PC. I bought a mini DIsplayPort to DVI adapter which i have connected to the thunderbolt port on my iMac. The external display does not appear on my iMac and my external monitor displays nothing either. My monitor says VGA: No input when it is switched on, but all the cables are connected.

  2. #2

    Lifeisabeach's Avatar
    Member Since
    Sep 30, 2007
    Location
    The Republic of Neptune
    Posts
    7,730
    It sounds like you've overcomplicated the adapters. According to this post on Yahoo Answers, it sounds like you need a straight up Mini-DP to VGA adapter. Adding a DVI adapter in-between the DP and VGA is likely what's making it fail.
    Mini DisplayPort to VGA Adapter - Apple Store (U.S.)

    Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
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  3. #3

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
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    26,462
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    If the port on your monitor is VGA, then you'll need a mini displayport to VGA adapter like this.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  4. #4


    Member Since
    Jul 24, 2012
    Posts
    50
    Specs:
    iPhone 4s | iPad 2 | 21.5" iMac 2.7GHz 1TB
    Looks like i will have to go and buy another adapter then, thanks for the help.

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