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  • #3937651

    Very slow Macbook Pro Retina mid 2015

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    by trail71 ·

    I have a mid 2015 Macbook Pro retina – has suddenly become ultra slow! And I mean unusably slow.

    Have done all the usual things – SMC and PRAM reset – reinstalled the OS

    The Mac is even slow and laggy when in recovery mode so I’m guessing hardware?

    Blackmagic read/write speeds are around 150-200mpbs – Memtest checks out fine as does Drive DX

    Could this be a logic board issue?

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    • #3940647
      Avatar photo

      First suggestion was going to be

      by mrmacfixit ·

      In reply to Very slow Macbook Pro Retina mid 2015

      a dying hard drive but I see that the mid 2015 MBP uses flash storage.
      If those Black Magic results are real, then you have an extremely slow Flash drive there. Typical readings would be in MB/s
      Flash storage has a limited life span and when they go, they tend to go fast.
      While the processor could be at fault, it cannot be changed out. Replacing that mean replacing the enter logic board which will cost about as much as a new MBP. Flash Storage, on the other hand, can be replaced but Apple is very proud of it, which is reflected in the price.
      You mentioned reinstalling the OS. with just the OS installed and no 3rd part stuff, was there any difference in the speed?
      P

      • #3940646

        Slow what ever state it is in

        by trail71 ·

        In reply to First suggestion was going to be

        Hi there

        Yes – a vanilla install is exactly the same – have also booted from a USB into a ubuntu live install and that is the same

        Do you think that it could be the SSD even when running from in Recovery mode?

        I’ve seen a used one on ebay for about 20 quid which might make it worth a punt

        • #3940645
          Avatar photo

          At ÂŁ20 it’s certainly worth a try

          by mrmacfixit ·

          In reply to Slow what ever state it is in

          ensure that it is exactly the same type as the one installed, there are a number of variations.

          Just had another theory shot down. Removing RAM and rebooting but I see there are no RAM slots in that MBP.

          Try the drive replacement, it’s a cheap enough attempt even if it fails.

          P

    • #3940644
      Avatar photo

      If you do decide to get it repaired.

      by rproffitt ·

      In reply to Very slow Macbook Pro Retina mid 2015

      Look up Louis Rossmann. In fact you should call them and see what they think as some models should never be repaired.

      • #3940643
        Avatar photo

        Unfortunately the OP is not in the US

        by mrmacfixit ·

        In reply to If you do decide to get it repaired.

        The use of “Quid” would indicate UK.

        P

        • #3940642
          Avatar photo

          Still would call.

          by rproffitt ·

          In reply to Unfortunately the OP is not in the US

          Louis knows folk around the world but still would ask if this model has known issues. At least they got 5 or more years out of it.

          -> And yes, do try another drive as it’s cheap.

        • #3940639
          Avatar photo

          In the news. 2015 Macbook Pro.

          by rproffitt ·

          In reply to Unfortunately the OP is not in the US

          Not the problem you noted but we do know that many laptops clock down if there are hardware issues. Just this week someone discussed this issue with me. But hey, let’s hear what Louis says next:
          [youtube]QCYgGuZZ34Y[/youtube]

          Takeaways: This failure is very rare. Also, Louis gets machines from all over the world.

          -> Notice Ifixit calls out the battery as well as heatsink compound at https://www.ifixit.com/Answers/View/582349/Boot+problems,+slow+and+lagging+MacBook

          There’s a lot of possible issues on Trail71’s laptop. So which would I attempt first? [b]The cheapest one.[/b]

          This advice was given to me decades ago. It applies to just about any repair job where you’re not sure what part it is.

    • #3939656

      Final outcome

      by trail71 ·

      In reply to Very slow Macbook Pro Retina mid 2015

      Hi all

      So I’ve got my Macbook back from Apple – long story short, they say they tried a new NVME drive and it worked fine but at ÂŁ220 it’s not cost-effective to replace it in my eyes

      I purchased a used original apple nvme from ebay and have just installed it – sadly the Macbook is exactly the same.

      I know it could be that this drive is also faulty, but I find that too much of a coincidence.

      My question is, as the Macbook is now going to sell for spares, is there an adapter that lets me convert the Apple NVME drive to a more convention connector? I can at least change the drive into a portable disk at the very least.

      Thanks

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