6 Replies Latest reply: Mar 23, 2013 2:51 AM by Ongelovige
Ongelovige Level 1 (0 points)

Since upgrading to Mountain Lion my Macbook pro has become slow and sluggish.




Macbook Pro

2,66 GHz Intel Core i7

8 GB 1067 MHz DDR3

NVIDIA GeForce GT 330M 512 MB


When I first upgraded to Mountain Lion the system felt slower. Lots of beachballs where they were'nt before. Even in simpel Apps like mail. It also took longer to boot.


One week later the mac wouldn't boot at all. Recovery told me there was a bad Hard Link and the disk couldn't be repaired.  I formatted the drive, reinstalled Mountain Lion then transferred my files back using Time Machine.


Then Premiere Pro cs6 crashed. Restoring through Time Machine didn't work. I had to reinstall the app.


Now the Mac appears to be working, only  it is still slow. Finder often doesn't recognize external devices (it sees them but they are grey so I can't use them).


Finder often doesn't react for 10 minutes.


Forcing to stop finder stops it, but then it won't restart. Shuting the system down using Shut Down under apple logo doesn't work either. I have to use the power button.


I have half a mind to go back to Snow Lepoard since everything worked well in that OS, but I see no reason why ML shoudl react this way on my system.


Any Thoughts?

MacBook Pro, OS X Mountain Lion (10.8.3)
  • macjack Level 9 (51,639 points)

    ML should be quicker and snapier. The only way to tell for sure would be to do a clean install, after re-formatting your HDD. You don't say whether you tested that while it was still clean or migrated first.


    The reason I say a clean install, is because it may be your hard disk, even if Disk Utility says it's OK.


    For now, see what happens in a fresh user account, or log in as Guest. Is it still slow?

  • Eric Root Level 9 (50,458 points)

    Apple support article covering what macjack suggested.


    Isolating an issue by using another user account


    If the problem is still there, try booting into the Safe Mode.  Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart. For each disable/delete, you will need to restart if you don't do them all at once.


    Safe Mode


    Safe Mode - About


    General information.


    Isolating issues in Mac OS X


    Troubleshooting Permission Issues



    Step by Step to Fix Your Mac


    Upgrade Nightmares


    Articles covering improving performance:


    Performance Guide


    Why is my computer slow


    Why your Mac runs slower than it should

  • Ongelovige Level 1 (0 points)

    Thanx for the quick response guys!


    I signed in as a guest and although i couldn't really test the speed using all my regular apps, it did seem a lot faster.  I think a clean install is worth a try. However, do you recommend not using Time Machine to migrate my files back at all? (not even keychain and mail)?



  • macjack Level 9 (51,639 points)

    No, not just yet. Seems like the issue may only be in your User.


    Log back into your problem account and go to System Preferences > Users & Groups > Login Items and remove all of them using the "-" button. You can always add them back later. Reboot and test.

  • Eric Root Level 9 (50,458 points)

    If what macjack suggected above doesn't work, try finishing the troubleshooting steps, like Safe Mode.

  • Ongelovige Level 1 (0 points)

    You guys are right.


    So I looked into login screen under users, but there was only Canon IJ Networks and Itunes Helper in there.

    I shut both of them off.


    I also ran Safe mode. While in Safe mode the graphics were staggering a bit, dropping frames when opening a folder from the dock or going to mission control.


    I Rebooted again and now things seem to be working nomally. But I have to test over a longer period to be shure. So I'll keep you posted on my experiences.