MacBook Pro slowed down wildly

Discussion in 'MacBook Pro' started by Omnius, Feb 23, 2014.

  1. Omnius macrumors 6502a

    Joined:
    Jul 23, 2012
    #1
    Mac book pro early 2011,13" with 8 gb of ram running mavericks. It's running dead slow. I've tried resetting pram, smc, new install and new hd. The CPU is like perma running above 300%. I'm stumped as to what caused it.
     
  2. simon48 macrumors 65816

    simon48

    Joined:
    Sep 1, 2010
    #2
    Define "dead slow". What apps are you running when it's slow? What's your RAM usage/pressure?
     
  3. Omnius thread starter macrumors 6502a

    Joined:
    Jul 23, 2012
    #3
    It's not beachballing and basically never exceeding 4gb in use
     
  4. simon48 macrumors 65816

    simon48

    Joined:
    Sep 1, 2010
    #4
    "It's not beachballing" doesn't define "dead slow".
     
  5. yjchua95 macrumors 604

    Joined:
    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #5
    HDD or SSD?
     
  6. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #6
    Sounds fine so far, what is using high CPU when running "slow"??
     
  7. Omnius thread starter macrumors 6502a

    Joined:
    Jul 23, 2012
    #7
    Kernel

    ----------

    Extreme lag, cursor lags, typing lags, everything takes forever to load. But after I first do fresh installs or reset pram and smc, it's fast and normal for about 2 minutes.

    ----------

    Hd but as I said in the op, I've already ruled out the hard drive because I put a new one in.

    ----------

    The problem apparently predates upgrading the ram to 8gb from the original built in 4gb a year ago.
     
  8. yjchua95 macrumors 604

    Joined:
    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #8
    Well then you don't know what you're missing without an SSD :)

    http://1drv.ms/1mgZece

    This is my 2011 MBP booting up in seconds (512GB Samsung 840 Pro) and going into an instantly-useable state after login.
     
  9. Omnius thread starter macrumors 6502a

    Joined:
    Jul 23, 2012
    #9
    This isn't a general gripe about age or slowly deteriorating performance. This a complete inability to do anything with any reasonable speed.
     
  10. niteflyr macrumors 6502a

    Joined:
    Nov 29, 2011
    Location:
    Southern Cal
    #10
    Obviously something is amiss as 300% CPU usage for Kernel is the problem. Normally I would say a software issue, but given you have re-installed OSX on a new hard drive, I would say not. Did you try it with a truly clean install? Just OSX and nothing else. No peripherals plugged in, no other software, etc.

    The next thing I would look into is the RAM. Swap positions with the RAM modules. Try them 1 at a time. Try the original Ram modules, also 1 at a time, etc. Good luck!
     
  11. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #11
    I was thinking RAM too, have you upgraded? If so try the original, is it recognizing both modules??
     
  12. Omnius thread starter macrumors 6502a

    Joined:
    Jul 23, 2012
    #12
    It's recognizing both ram chips. I've tried switching them and using just one at a time with indentical results.

    After a new install it works at the proper speed for about 5-10 mins and bogs back down. It's the damnedest thing and it has me stumped. I'm comfortable working on anything short of work that involves soldering and I'm generally able to resolve software and hardware issues pretty easily.

    ----------

    I agree and I've done all of this with no success. I'm totally stumped because this basically indicates motherboard failure without symptoms that would indicate its motherboard failure.

    ----------

    8gb of ram should be more than enough. The computer belongs to my boss (I'm somehow tasked with fixing it despite not being an it worker). He insists the problem predates the ram upgrade. Maybe I'll dig through my machines and find the same ram to test that too.
     
  13. Altemose macrumors G3

    Altemose

    Joined:
    Mar 26, 2013
    Location:
    Elkton, Maryland
    #13
    I have seen similar slow downs when using a bad hard drive cable. However, that is generally shown by constant beach balling. Does this happen under Snow Leopard, Lion, or Mountain Lion? Can you try doing an Internet Recovery to Lion or back to Snow Leopard?
     
  14. BasicGreatGuy Contributor

    BasicGreatGuy

    Joined:
    Sep 21, 2012
    Location:
    In the middle of several books.
    #14
    Even though the drive is new, it could still be defective. If you have another drive you can test with, swap it out and see what happens.
     

Share This Page