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RoXy1988 Level 1 (0 points)

Hi there !
I noticed that my MBP is running very slow when it's on batteries.. but when plugged to charger it works fine..

Is the battery drained already ? I purchased it OCT 2011 but has been using it lightly for almost 5 months .. 

P.s : I cleaned it up coz I thought its a space or piled files issues but it didn't work

 

 

 

Thank u in advance


MacBook Pro, Mac OS X (10.7)
  • John Galt Level 8 (45,936 points)

    RoXy1988 wrote:

     

    P.s : I cleaned it up

     

    How did you do that?

  • RoXy1988 Level 1 (0 points)

    I used MacKeeper  + onyx

  • John Galt Level 8 (45,936 points)

    First, if you have encrypted any files using MacKeeper, unencrypt them using MacKeeper.

     

    Then, read and follow the instructions here: http://mackeeper.zeobit.com/uninstall_mackeeper

     

    You do not need to answer the "reason for uninstalling" question that appears.

     

    Macs do not need "cleaning". Never install MacKeeper or anything like it ever again.

  • RoXy1988 Level 1 (0 points)

    thank u but I didn't do that untill i faced that sudden slow running .. but thank u again for the info .. I did what u told me still no change .. still very slow when I unplug the charger

  • John Galt Level 8 (45,936 points)

    Reset the SMC, then test your MacBook Pro again.

     

    SMC reset:

     

    Before Resetting the SMC

     

    Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to determine if the issue still occurs.

     

    1. Press Command + Option + Escape to force quit any application that is not responding.
    2. Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosing Sleep. Wake the computer after it has gone to sleep.
    3. Restart your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
    4. Shut down your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.

     

    Resetting the SMC on portables with a battery you should not remove on your own

     

    1. Shut down the computer.
    2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
    3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
    4. Release all the keys and the power button at the same time.
    5. Press the power button to turn on the computer.
  • RoXy1988 Level 1 (0 points)

    I did it many times it didn't work I guess actually it seems that the problem became worse .. my charger is flashing green ( full charged ) but the battery is only charged 96%,

    is my battery damaged ?

  • John Galt Level 8 (45,936 points)

    This is normal. The battery may appear to stop charging between 93 percent and 99 percent. The batteries used in these computers are designed to avoid short discharge/charge cycles in order to prolong the overall life of the battery.

     

    If you think it is still running poorly while on battery power there may be an running process causing this that you may be able to fix. To determine what it might be read:

     

    Runaway applications can shorten battery runtime

     

    If you cannot find any obvious runaway process, consider performing the following two troubleshooting steps:

     

    Creating a temporary account to isolate user-specific problems: Isolating an issue by using another user account

     

    Safe Mode or "Safe Boot" is a troubleshooting mode that bypasses all third party system extensions and loads only required system components. Read about it: Starting up in Safe Mode

     

    If after performing these procedures you still think something is wrong, schedule a Genius Bar appointment:

     

    Genius Bar Reservations: http://www.apple.com/retail/geniusbar/

  • tony_stead Level 1 (5 points)

    Try this at your own risk - It Worked for me after a complete system reload which didn't make any difference.

     

    I will take no responsibility for any damage or loss caused to you or your property. Do it of your own free will and at your own risk.

     

    I did this on a  MacBook Pro Early 2011 - 2.7 GHz Intel Core i17

    System Version 10.6.8 Snow Leopard

     

    Running well on mains power but dramatically slowing down when running on battery power

     

    First try this  to see if you get the same result I got

     

    Quit all programs

    With the mains connected

    Open Activity Monitor and click on CPU in the bottom half of the window

    Check the CPU Usage graph - It will probably be minimal - Under 1%

    Now disconnect the mains and watch the graph shoot up and CPU activity around 80%

     

    Here's what I did...

     

    Again - I will take no responsibility for any damage or loss caused to you or your property. Do it of your own free will and at your own risk.

     

    Firstly, you’re going to need the model identifier of your Mac,

    go to the Apple in the menu bar and select "About this Mac"

    When the About this Mac pane appears click on "More info…"

     

    Select Hardware in the left panel

    In the right panel make a note of the Model Identifier  e.g. "MacBookPro8,1"

     

    Now open a finder window and click on Macintosh HD

    Click on system >Library > Extentions

    Find the kext file called IOPlatformPluginFamily.kext

    Right click it and Show Package Contents

    Click on contents

    Click on Resources

    Click on PlugIns

    Right Click on ACPI_SMC_PlatformPlugin.kext

    Right click it and Show Package Contents

    Click on contents

    Click on Resources

    Find the the plist file that corresponds to your Model Identifier e.g. "MacBookPro8,1.plist"

    Move it to the trash and delete it

    Restart and everything should now be fine.

  • Abhishikth Karumanchi Level 1 (0 points)

    hey thanks a lot!!! it really worked!!! my mac had the same problem, but then i deleted the file n now its working fine!! i was planning to change n try buying a new battery n u saved me that cost!! thanks a lot!!

  • Yodler Level 1 (0 points)

    I am at the same point as the few reporting unexplicable CPU load after disconnecting the charger which leads to sluggish UI operation etc.. (MBP 13 early 2011, 2.3GHz)

    Is this truely working? just wanting to confirm before I delete the file. I have a back-up just in case.

     

    Thanks

  • tony_stead Level 1 (5 points)

    Yodler, it worked for me and it also worked for Abhish. I haven't noticed any side effects from deleting the file, if you are worried back up the file so you copy it back.

     

    Regards

    Tony

  • Yodler Level 1 (0 points)

    Just an observation to alleviate my concern about the possible side-effect of removing this kext file

    The original explanation what this file is designed to do i.e. running a low level task to a max to cool the CPU does not make sense because when my CPU is at 40 -50 Grad C  20 min after a boot  the kernel file is already hogging cycles to slow down all other apps. The kernel cycle hog does its job at any temperature it seems ......

  • AaronGodsGiftAsenso Level 1 (0 points)

    Thanks Although Is Was Scared To Do This It Worked!!!!

    Thanks

  • Fayçal Level 1 (0 points)

    Thank's a lot dear Tony_stead for this post,you saved me.The problem is solved now

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