2011 MacBook Pro 15" running slow

Discussion in 'MacBook Pro' started by Chef927, Jul 9, 2017.

  1. Chef927 macrumors newbie

    Chef927

    Joined:
    Jul 9, 2017
    #1
    Hello all,

    I have an early 2011 15" MacBook Pro (a1286).
    2.2GHz Intel Core i7.
    I have upgraded to a sandisk SSD (256GB).
    And I also upgraded to 16GB crucial DDR1333 ram.
    I am running the latest version of Sierra (10.12.5).

    My computer has been running slow ever since and I have tried many things to fix it. I have reset the PRAM and the SMC. I have replaced the HDD flex cable, the cable that connects the hard drive to the computer. I put the original memory back in, so I know that it's something either to do with the hard drive or maybe some other physical component.

    When I turn it on, the apple logo appears right away, but takes 1-2 minutes to get to the log-in screen. And while using the computer it is extremely slow, slower than with the original hard drive. I have searched everywhere and no one seems to have the exact symptoms that I'm experiencing.

    I have made sure that the boot disk is set to the SSD.

    I have also gone in and fixed the kernel task issue that seems to plague these 2011 machines.

    Any help! Thank you!!!
     
  2. New_Mac_Smell macrumors 68000

    New_Mac_Smell

    Joined:
    Oct 17, 2016
    Location:
    Shanghai
    #2
    The only real way to determine any faults is to instal a fresh copy of MacOS. Ideally the one it came with. Seeing as you've said you've tried a few basic hardware diagnostics, start looking into the software. Chances are if it's an old machine and you haven't done it before, years of adding/removing apps has left a few errant kexts, kernels, or files on there hampering the system.
     
  3. Chef927 thread starter macrumors newbie

    Chef927

    Joined:
    Jul 9, 2017
    #3
    I installed a fresh OS of Sierra. I downloaded it from apple. I don't have the original disk for mavericks.
    I didn't clone the hard drive that I had in it. I started fresh.
     
  4. New_Mac_Smell macrumors 68000

    New_Mac_Smell

    Joined:
    Oct 17, 2016
    Location:
    Shanghai
    #4
    Did you look through the App Store? Assuming you've had it for 6 years you should have downloads of the OS's going back that far. Or did you start it in recovery? Should be able to download the OS from there. Sierra should be okay but it's right at the end of the supported hardware list, my 2011 got fairly slow on Sierra.
     
  5. Chef927 thread starter macrumors newbie

    Chef927

    Joined:
    Jul 9, 2017
    #5
    I've owned it for 3 years so I don't have the OS back that far. Is there a way to get an older OS? I am thinking that is the problem, that Sierra is just not happy on this machine.
     
  6. New_Mac_Smell macrumors 68000

    New_Mac_Smell

    Joined:
    Oct 17, 2016
    Location:
    Shanghai
    #6
  7. ab298 macrumors member

    Joined:
    Jun 18, 2017
    #7
    Shift-Option-Command-R may reinstall an earlier version : at least according to Apple.
    https://support.apple.com/en-us/HT204904
     

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