rMB and mini display-port imac...

Discussion in 'MacBook' started by jj69, Apr 29, 2015.

  1. jj69 macrumors newbie

    Joined:
    Apr 29, 2015
    #1
    Hi all-

    I'm interested in getting a rMB but curious to know if it will do what I hope it can....

    I have a 2009 mini display-port equipped 27" imac. I would hope to use it as a second display for the rMB, with the imac in target display mode. If i use apple's av multiport dongle, would I be able to successfully send the video signal to the imac using an hdmi to mini-dp cable? Would it come in as 2560x1440? Has anyone tried this?

    thanks!
     
  2. fyrefly macrumors 6502a

    Joined:
    Jun 27, 2004
    #2
    AFAIK, the HDMI won't work.

    There is a Google-sold (and Monoprice Pre-ordered) USB-C to Displayport cable - that I assume will work with a Female Displayport to male Mini Displayport Dongle/Cable.

    I can't get Google to deliver a cable to Canada, so I haven't tried it myself, but I assume it'll work.
     
  3. JTToft macrumors 68040

    Joined:
    Apr 27, 2010
    Location:
    Aarhus, Denmark
    #3
    - Nope. Outside of expensive active converters, HDMI can't be converted to DisplayPort.

    But as mentioned, Google sells a cable that should work.
     
  4. mattopotamus macrumors G4

    mattopotamus

    Joined:
    Jun 12, 2012
    #4
    really? I use a display port adapter with my HDMI monitor. I have an 11" air, which does not have HDMI. I have to go through the thunderbolt port with a HDMI adapter. Does it not work the other way around? Thunderbolt monitor to HDMI?

    http://www.amazon.com/AmazonBasics-...6086&sr=8-1&keywords=mini+displayport+to+hdmi
     
  5. cfedu macrumors 65816

    cfedu

    Joined:
    Mar 8, 2009
    Location:
    Toronto
    #5
    Who mentioned thunderbolt? This is a 2009 iMac without thunderbolt and a 2015 MB without thunderbolt. It is possible to connect this imac with the proper passive DP adapter. It might be possible with HDMI with the use of active adapters, but this would cost more and provide an inferior experience. If this was a thunderbolt iMac it would be 100% impossible to connect to the 2015 MB via hardware connection.
     
  6. mattopotamus macrumors G4

    mattopotamus

    Joined:
    Jun 12, 2012
    #6
    sorry mini display port is the same "input" as the thunderbolt. I am using a mini display port adapter, plugged into the thunderbolt port, with HDMI.

    Could he not just plug the HDMI cable into the adapter plugged directly into the rMB, and then plug the mini display port adapter I posted into the HDMI cable, and then into the monitor?
     
  7. redheeler, Apr 30, 2015
    Last edited: Apr 30, 2015

    redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #7
    I doubt it would work the other way around. While Mini DisplayPort/Thunderbolt can output an HDMI signal, it can't take such a signal as input.
     
  8. cfedu macrumors 65816

    cfedu

    Joined:
    Mar 8, 2009
    Location:
    Toronto
    #8
    Nope. DP has a HDMI signal whereas HDMI does not have a DP signal, and active adapter would be required which would most likely restrict the resolution to 1080P(1200P).
     
  9. mattopotamus macrumors G4

    mattopotamus

    Joined:
    Jun 12, 2012
    #9
    Thanks!
     
  10. mikeray macrumors regular

    Joined:
    Jan 17, 2006
    Location:
    Brooklyn, NY
    #10
    that USB-C port, on the other hand, DOES output Mini DisplayPort :cool:
     
  11. jj69 thread starter macrumors newbie

    Joined:
    Apr 29, 2015
    #11
    thanks guys. well hopefully in 4-6 wks/months/years ill be able to test out usb-c to mini display port. But maaannn apple is making it hard for a human to actually acquire their products....
     
  12. fyrefly macrumors 6502a

    Joined:
    Jun 27, 2004
    #12
    Yeah, this launch has been universally bad (both the rMB and the Watch).

    But Monoprice (at least as of this Afternoon) had USB-C to DisplayPort back in stock. I ordered one. And a Displayport F to Mini-DP M converter - I'll let you know if it works with my MacBook and 27" 2009 iMac with Mini-DP.
     
  13. jj69 thread starter macrumors newbie

    Joined:
    Apr 29, 2015
    #13
    hey fyrefly-- any luck using your imac as a 2nd display? Got my rMB coming monday!
     

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