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  1. #1
    use iMac 2011 27 as target display
    jasongoldworthy's Avatar
    Member Since
    Aug 28, 2017
    Location
    Wales, UK
    Posts
    141
    Your Mac's Specs
    iMac Late 2009 32GB Intel Core i7 27" OSX 10.13.6
    use iMac 2011 27 as target display
    hi guys

    am I missing something here I have a MINI DP TO MINI DP cable connected between my iMac 27" 2011 and my Mac Pro 3.1

    and its as if the iMac don't see it ?


    do I need some sort of adapter ??

    I have got 2 20" cinema displays but I thought id try and save space by just using the screen in the iMac


    thanks for any help.
    Mac Pro 4,1 Upgraded To 5,1
    32GB Ram
    Mac OSX 10.14.5
    512GB NVME 2TB 2TB 2TB HDD

  2. #2
    use iMac 2011 27 as target display
    Slydude's Avatar
    Member Since
    Nov 16, 2009
    Location
    North Louisiana, USA
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    14,013
    Your Mac's Specs
    2.8 GHz 2008 MacBook Pro 10.11, 8 GB mem, iPhone XS, 2015 iMac 16 GB 10.14.4 beta
    Does any of the info here help? Don'y forget yu have to press Command F2.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  3. #3
    use iMac 2011 27 as target display
    jasongoldworthy's Avatar
    Member Since
    Aug 28, 2017
    Location
    Wales, UK
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    141
    Your Mac's Specs
    iMac Late 2009 32GB Intel Core i7 27" OSX 10.13.6
    hi slydude thanks for the link you have shared


    im thinking thats where ive gone wrong as both ports on the rear of my 27' iMac are thunderbolt ports

    and based on what that says there its thunderbolt to thunderbolt

    not thunderbolt to display (ummmmm)

    thanks for the Command F2. I knew that bit


    cheers

    Jason
    Mac Pro 4,1 Upgraded To 5,1
    32GB Ram
    Mac OSX 10.14.5
    512GB NVME 2TB 2TB 2TB HDD

  4. #4
    use iMac 2011 27 as target display
    pm-r's Avatar
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    im thinking thats where ive gone wrong as both ports on the rear of my 27' iMac are thunderbolt ports
    and based on what that says there its thunderbolt to thunderbolt
    not thunderbolt to display (ummmmm)

    Plus the fact that your iMac model is not listed as a compatible iMac to use for Target Display. Not exactly a minor obsticle.



    - Patrick
    ======

  5. #5
    use iMac 2011 27 as target display
    jasongoldworthy's Avatar
    Member Since
    Aug 28, 2017
    Location
    Wales, UK
    Posts
    141
    Your Mac's Specs
    iMac Late 2009 32GB Intel Core i7 27" OSX 10.13.6
    hi Patrick if you go on the link that Sly shared you will see that my iMac can be used as a target display.

  6. #6
    use iMac 2011 27 as target display
    pm-r's Avatar
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    Quote Originally Posted by jasongoldworthy View Post
    hi Patrick if you go on the link that Sly shared you will see that my iMac can be used as a target display.

    I guess I must be blind Jason, as that's the same site that I got my information from, ie:
    See the list below for iMac models that support Target Display Mode, ...
    ...
    iMac models you can use
    as a display
    I see no sign of your iMac 2011 27 being compatible, but as I say, I must be blind and I guess I missed it.

    Anyway, good luck if you get it working.



    - Patrick
    ======

  7. #7
    use iMac 2011 27 as target display
    jasongoldworthy's Avatar
    Member Since
    Aug 28, 2017
    Location
    Wales, UK
    Posts
    141
    Your Mac's Specs
    iMac Late 2009 32GB Intel Core i7 27" OSX 10.13.6
    hi Patrick maybe im blind lol or wrong

    I just read the link again and it says the following

    iMac models you can use
    as a display Cable you need Port you need on your other Mac
    iMac (27-inch, Late 2009) Mini DisplayPort to Mini DisplayPort Mini DisplayPort or Thunderbolt
    iMac (27-inch, Mid 2010) Mini DisplayPort to Mini DisplayPort Mini DisplayPort or Thunderbolt
    iMac (Mid 2011-Mid 2014) Thunderbolt Thunderbolt

    now I believe mine comes under the iMac Mid 2011 - Mid 2014
    Mac Pro 4,1 Upgraded To 5,1
    32GB Ram
    Mac OSX 10.14.5
    512GB NVME 2TB 2TB 2TB HDD

  8. #8
    use iMac 2011 27 as target display
    ferrarr's Avatar
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    May 21, 2012
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    Your Mac's Specs
    L2014 Mac mini macOS 14, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    Are you using a Mini Display Port cable, or a Thunderbolt cable?
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  9. #9
    use iMac 2011 27 as target display
    pm-r's Avatar
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    Quote Originally Posted by jasongoldworthy View Post
    hi Patrick if you go on the link that Sly shared you will see that my iMac can be used as a target display.
    Quote Originally Posted by jasongoldworthy View Post
    hi Patrick maybe im blind lol or wrong

    I just read the link again and it says the following

    iMac models you can use
    as a display Cable you need Port you need on your other Mac
    iMac (27-inch, Late 2009) Mini DisplayPort to Mini DisplayPort Mini DisplayPort or Thunderbolt
    iMac (27-inch, Mid 2010) Mini DisplayPort to Mini DisplayPort Mini DisplayPort or Thunderbolt
    iMac (Mid 2011-Mid 2014) Thunderbolt Thunderbolt

    now I believe mine comes under the iMac Mid 2011 - Mid 2014

    Oppps, my mistake Jason. I can't even read the facts properly!!! Maybe it was the beer I had with the hamburgers I cooked up for Mother's Day to celebrate with my wife cousin and sister.

    What's really stupid is I have the same mid-2011 27 inch iMac that I use daily and I should have known better.



    - Patrick
    ======

  10. #10
    use iMac 2011 27 as target display
    jasongoldworthy's Avatar
    Member Since
    Aug 28, 2017
    Location
    Wales, UK
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    141
    Your Mac's Specs
    iMac Late 2009 32GB Intel Core i7 27" OSX 10.13.6
    its ok Patrick it happens lol

    and hi bob im using a mini display port cable to mini display port cable

    it works to output to a normal monitor but won't output to the Mac to save desk space


    thanks
    Mac Pro 4,1 Upgraded To 5,1
    32GB Ram
    Mac OSX 10.14.5
    512GB NVME 2TB 2TB 2TB HDD

  11. #11
    use iMac 2011 27 as target display
    pm-r's Avatar
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    and hi bob im using a mini display port cable to mini display port cable

    it works to output to a normal monitor but won't output to the Mac to save desk space

    Well I've read that guide over several times now and I don't think I'm screwing up this time, but I'm sure it says:

    For using your iMac model: you need a Thunderbolt cable and your other Mac also needs a Thunderbolt cable using the Thunderbolt port of course.

    Screen Shot 2019-05-13 at 2.22.21 PM.png




    Or did I misread something again???

    And that doesn't seem to be what you are using according to what you posted.

    BTW: Did you add a Thunderbolt port to your Mac Pro 3.1 as I don't see it having one normally.
    Mac Pro "Quad Core" 2.8 (2008) Specs (Early 2008, BTO/CTO, MacPro3,1, A1186, 2180): EveryMac.com



    - Patrick
    ======
    Last edited by pm-r; 05-13-2019 at 05:45 PM.

  12. #12
    use iMac 2011 27 as target display
    jasongoldworthy's Avatar
    Member Since
    Aug 28, 2017
    Location
    Wales, UK
    Posts
    141
    Your Mac's Specs
    iMac Late 2009 32GB Intel Core i7 27" OSX 10.13.6
    no of course your not missing anything


    the Mac Pro 3.1 don't have thunderbolt lol but does have MINI Display Ports

    silly me thought it would work with a display to display port cable but I guess thats where ive gone wrong.
    Mac Pro 4,1 Upgraded To 5,1
    32GB Ram
    Mac OSX 10.14.5
    512GB NVME 2TB 2TB 2TB HDD

  13. #13
    use iMac 2011 27 as target display
    pm-r's Avatar
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    Quote Originally Posted by jasongoldworthy View Post
    no of course your not missing anything

    the Mac Pro 3.1 don't have thunderbolt lol but does have MINI Display Ports

    silly me thought it would work with a display to display port cable but I guess thats where ive gone wrong.

    I was wondering "why not" as the Thunderbolt and MINI Display Ports were tecnically quite similar so a Google search found this and maybe you could make something positive from it but I doubt it. I was thinking on wondering if there may not be some sort of adapter, and maybe there is because I've given up.

    Anyway have a read here if you like:
    Thunderbolt is fully compatible with Mini DisplayPort peripherals . Technically, the plug is the same and the only difference is that the Thunderbolt connector can carry – in addition to the classic Mini DisplayPort – a Thunderbolt signal, which is a signal PCI-Express (4 lines).
    ...
    Last but not least, the Target Display mode.

    This is the only time when Thunderbolt is a real problem. With a 27-inch 2009 or 2010 iMac, it is possible to use the Mini DisplayPort output as an input : plug a Mini DisplayPort cable between the iMac and the other Mac, and use the first one as a screen. The same adapters allow you to connect an HDMI source on an iMac.

    With the Thunderbolt, it no longer works. You may use an old iMac as a screen on a recent Mac, but not a recent iMac. Actually, the 21-inch and 27-inch 2011 and 2012 iMac are “Target Display” but only on Thunderbolt. And only with the Apple Thunderbolt cable. HDMI adapters do not work (yet) on iMac 2011 or iMac 2012.
    Thunderbolt and Mini DisplayPort : differences and compatibility | Le journal du lapin
    (bolding mine)

    So, close but still missing the boat it seems as to actually working.

    Maybe you can make something out of it all and get it all working.



    - Patrick
    ======

  14. #14
    use iMac 2011 27 as target display
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    57,876
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 7+, iPhone 8, Numerous iPods, Mojave
    Hey Patrick:

    I thought I read something where the Retina model iMacs could not be used for Target Display, is that correct?

  15. #15
    use iMac 2011 27 as target display
    pm-r's Avatar
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    Oct 16, 2010
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    Brentwood Bay, BC, Canada
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    Quote Originally Posted by chscag View Post
    Hey Patrick:

    I thought I read something where the Retina model iMacs could not be used for Target Display, is that correct?

    I don't know but the article says:
    iMac (Retina 5K, 27-inch, Late 2014) and later iMac models can't be used as Target Display Mode displays.
    Use your iMac as a display with Target Display Mode - Apple Support

    Maybe that's where you read it.

    I can't recall exactly what year the retina iMacs came into being.

    A quick google says it looks like late 2014:
    In October 2014, the seventh major revision of the 27-inch (69 cm) iMac was announced, whose main feature is a "Retina 5K" display at a resolution of 5120 × 2880 pixels. The new model also includes a new processor, graphics chip, and IO, along with several new storage options.[3] The seventh major revision of the 21.5-inch (55 cm) iMac was announced in October 2015. Its main feature is a "Retina 4K" display at a resolution of 4096 × 2304 pixels.
    iMac - Wikipedia



    - Patrick
    ======

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