Installed USB 3 in iMac 2009 - but only getting USB 2 speeds

Discussion in 'iMac' started by qwerty0, May 17, 2018.

  1. qwerty0, May 17, 2018
    Last edited: May 17, 2018

    qwerty0 macrumors newbie

    Joined:
    Nov 13, 2013
    #1
    Hello,

    I followed the instructions from "https://forums.macrumors.com/threads/adding-usb3-0-to-late-2009-imac-11-1.1979806/#post-26064070" which were limited but gave me a lot of hope. But, after doing it all I find myself with 2 more USB 2 ports. Basically the system identifies a USB 3 Superspeed Bus and a USB 3.0 High Speed Bus. But, when I connect drives to the new ports they only load on the USB 3.0 High Speed Bus.

    I am using the moded AppleUSBXHCI. FWIW all the info listed under the 2 buses is identical in the system information windows. Same PCI dev ID, rev ID, vendor ID, and bus number.

    Installed kexts and setting dev mode to 1 was all new stuff to me. I tried the Generic USBXHCI but same results.

    Anyone have thoughts?
     
  2. chabig macrumors 603

    Joined:
    Sep 6, 2002
    #2
    My thought is that your post in the aforementioned thread, where the discussion is taking place, should result in answers. There is no need for a new thread.
     
  3. jerwin macrumors 68020

    Joined:
    Jun 13, 2015
    #3
    Are you using the proper cables? Are they inserted all the way?
     
  4. qwerty0 thread starter macrumors newbie

    Joined:
    Nov 13, 2013
    #4
    That's an interesting question - as far as I can tell yes. The drivers are mounting - just as USB 3 - Hi-Speed (not super speed).

    I hope you're right - though given the age of the thread after the fact
     

Share This Page