MacBook Pro (2012 Non Retina) running slow after swapping HDD

Discussion in 'MacBook Pro' started by jwatters579, Sep 16, 2016.

  1. jwatters579 macrumors newbie


    Jun 20, 2015
    Has anyone experienced this? I swapped the HD out of my iMac to my Macbook Pro. Both systems were running at a good speed prior. Once I did the swap, I noticed the Macbook was running slower (more color pinwheels, slower speeds trying to complete tasks, etc). Would it be a good thing to do a fresh install of OS?
  2. keysofanxiety macrumors G3


    Nov 23, 2011
    Likely HDD SATA cable is on its way out. It's a very common fault on your model. Quite a cheap part to source and very quick repair. Ensure it's a brand-new genuine part rather than a refurb though.

    If you haven't already, I'd recommend swapping with an SSD. Even with a fresh HD/OS install, the newer OSs don't run that well on a spinning drive.
  3. Fishrrman macrumors G5


    Feb 20, 2009
    keys' suggestion about the cable is good advice.
    You can test this by connecting the original HDD via USB, and booting that way.
    Do you get a reasonably good bootup and performance afterwards?

    You should have bought a new SSD and put that into it, instead.
    Will make A WORLD of difference.
    You won't understand until you do it!

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