Macbook Pro Doesn't recognize Harddrive

Discussion in 'MacBook Pro' started by ElWaster, Oct 10, 2013.

  1. ElWaster macrumors newbie

    Aug 26, 2010
    Hi all,

    I'm at a loss here and can't seem to find anything else like this out there.

    So, my macbook pro doesn't recognize my internal harddrive. Out of nowhere one day it decided it didn't want to work. I went through all the usual steps, backup cd, safe mode etc... but I get shown the little icon of the file with a question mark in it.

    My next step was the remove the hard drive, put it in an external casing and connect via USB. My Macbook now DOES recognize the hard drive and boot up, but obviously I can't work with my hard drive off a USB because it's not fast enough and it's awkward.

    Does anyone know what might be the problem here and how I might fix it.
  2. priitv8, Oct 10, 2013
    Last edited: Oct 10, 2013

    priitv8 macrumors 68040

    Jan 13, 2011
  3. ElWaster thread starter macrumors newbie

    Aug 26, 2010
    Thank you, I'll investigate this - hopefully it is just the cable.
  4. ElWaster thread starter macrumors newbie

    Aug 26, 2010
    Hi I am looking at getting the cable replaced. to buy a new one from Amazon, but I need to make sure I get the right one.

    Can someone advise if I have the right one selected as some of them have varying names.

    The model of mac is:

    Macbook Pro 13-inch, Early 2011.

    I think I have the right one:"

    But i don't understand what the A1278 means...
  5. Binomio macrumors member

    Apr 20, 2012
    Part number 821-0814 is for the following models.
    MacBook Pro (13-inch, Mid 2010)
    MacBook Pro (13-inch, Early 2011)
    MacBook Pro (13-inch, Mid 2009)

    A1278 is the Model number, basically refers to all 13 inc Macbook Pros (excludes Retina)
  6. ElWaster thread starter macrumors newbie

    Aug 26, 2010
  7. jimmylegs101 macrumors newbie


    Sep 19, 2015
    Did changing out the SATA ribbon solve your problem?

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