USB to Ethernet Adaptor - Retina MacBook Pro

Discussion in 'Mac Accessories' started by nikguitar, Jun 12, 2012.

  1. nikguitar macrumors member

    Jul 30, 2011
    I really want to keep my 2 TB ports free so that I can plug my 2 external monitors. Do you know of any usb to ethernet adaptor that would work with the Retina Macbook Pro? I'm fine if not a gigabit adaptor as we don't go that fast here in my workplace.

  2. maflynn Moderator


    Staff Member

    May 3, 2009
    Any USB to ethernet adapter will work. I'm not sure about if the USB port can deliver the sustained bandwidth you may want for an ethernet port but to be honest I've not looked into it
  3. 808? macrumors 6502a

    Aug 4, 2011
    Hong Kong
    I don't see any reason the USB - Ethernet adapter that is in use with the MBA shouldn't work.

    Why not ask Apple to be 100% sure before buying?
  4. nikguitar thread starter macrumors member

    Jul 30, 2011
    Thanks guys for your replies - I'm checking how fast I can go now with current 2009 gigabit macbook pro

    Write ~5 MB/sec

    Read ~11MB/sec

    Would I get similar performance with a usb 2 to ethernet adaptor?

    Very many thanks again for all your thoughts.
  5. jamesr19 macrumors 6502

    Nov 7, 2009
    If you're using gigabit routing (router -> cable -> computer) then you're likely to see 0.1 of the speed as USB ethernet is 100Mbit.

    Your performance is less than gigabit anyway because although your laptop is gigabit, your router isn't - it's 100Mbit (11MB*8 = 88Mbit <- there are 8 bits in a byte). On most modern routers they have wireless N at 150Mbit so you're actually better off using Wifi than ethernet. If you didn't want to use wifi then you should expect the same speeds as you have at present because you're limited by your router not the ethernet port. If you want ethernet but don't want to upgrade your router then go USB as the thunderbolt one won't be an improvement
  6. theSeb macrumors 604


    Aug 10, 2010
    Poole, England
    Or the slightly more expensive Apple one.


    Your network is running 100 mbps routers/switches. 11 MB/sec is what I get using the USB to 100 mbps adaptor so you're not taking advantage of the gigabit ethernet in your MBP anyway.
  7. nikguitar thread starter macrumors member

    Jul 30, 2011
  8. aaronw1986 macrumors 68030

    Oct 31, 2006

    You could also just connect 2 monitors to one Thunderbolt port? The bandwidth should support that, and daisy chaining is possible.
  9. nikguitar thread starter macrumors member

    Jul 30, 2011
    Interesting! Could you elaborate on this please. I have two of these . How can I chain them?

  10. drsox macrumors 65816


    Apr 29, 2011
  11. Benni-chan macrumors newbie

    Apr 29, 2010
    I believe that only works with Apple's Thunderbolt Display.
    But you should be able to use a HDMI to DVI Adapter to use one Display on the HDMI Port and the other on one of the Thunderbolt Ports...
  12. jamesr19 macrumors 6502

    Nov 7, 2009
    Please keep us updated if this is actually the case as that would be a great reason to buy a RMBP!

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