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OS X Lion is incredibly slow (even after index)

200100 Views 287 Replies Latest reply: Jul 4, 2013 7:29 AM by NOYB234 RSS
  • Digitalclips Level 1 Level 1 (0 points)
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    Apr 5, 2012 6:37 PM (in response to bartjr)

    After I had the slow down initially after I updated Snow Leopard to Lion I almost did what you did.  One last idea I tried though worked. It was a lesson I learned in the pre OS X days.  I removed the entire preference folder from my ~/Library (user) and rebooted.  It was like night and day.  I then replaced preferences, one application at a time and logged out and in again until I had all the ones I actually used.  It was amazing how many were left from things long ago that I didn't replace.  I had updated several OS X versions without clean installs.  To this day Lion has been as fast as Snow Leopard.  Something in those old prefs were screwing with my set up for sure.  This is on a MBP i7, 1TB internal HD and 8 GB RAM.

  • bartjr Level 1 Level 1 (30 points)
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    Apr 6, 2012 7:40 AM (in response to jswin)

    I think I accomplished the same thing, but inadvertently. By installing a new disc (in my case an SSD), the clean install created a new preferences file in the new user folder.


    Since I also reinstalled all my software, there would be no left-over preferences. Maybe I received the benefit you speak of but didn't know it!

  • servnhim Level 1 Level 1 (0 points)
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    Apr 7, 2012 7:52 AM (in response to jswin)

    I have an iMac 24" 3.06ghz Core 2 Duo with 4 GB Ram and Lion runs like a turtle.  I did a clean install, wiping my hard drive and it ran ok, but it was way slower than 10.6.  After fixing permissions and the wonderful pinwheel of death, I returned to 10.6.x and my stable, fast machine returned.


    As an IT engineer, my conclusion is the Lion barely functions on a core 2 duo.  What is really sad is Window 7 flies on this machine and is extremely stable.  I believe many of you that have posted in regards that you are tolerating Lion.  I find it hard to believe that your Core 2 Duo machines are truely flying.  We have Dual Mac Pro's with the same chipsets and they also experience the slowness.


    My recommendation is to revert to 10.6 or buy a new machine. 

  • KFahlgren Calculating status...
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    Apr 8, 2012 6:32 AM (in response to jswin)

    I was browsing the internet on my MacBook Pro - watching a youtube video

    When suddently after closing full screen mode my computer froze. There were notning I could do.

    I did a hard reboot and now my finder runs extremely slow. I am trying to backup the inportant files, but whenever I click with the mouse finder goes crazy and the rainbow ting starts to spin for seertal minutes.

  • Tchikkaboum Calculating status...
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    Apr 9, 2012 8:37 AM (in response to jswin)

    I had a slow finder and problems with some applications taking forever to load for the past 2 weeks. Did the alt key restart, disk utility and it worked for me. THANK YOU!!!


    Strange, because I ran the disk utility with no success, but It had to be from the recovery HD. Now I'm hoping it'll stay that way!!!

  • DasLicht Level 1 Level 1 (55 points)

    Wven when I boot from a ExternalUSB HDD with SL installed is more reactive than my fresh installed OS X LION

  • osdaxxx Calculating status...
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    Apr 10, 2012 4:28 PM (in response to APierce24)

    Thanks.  This worked for me on my 2009 White Macbook. 

  • anderesa Calculating status...
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    Apr 11, 2012 2:17 AM (in response to MegaJustice)

    Thanks for your hint (*) which also solved performance problems on my Mac Mini after upgrading to OS Lyon. I also repaired permissions using Disk Utility program after booting with Cmd-R.



    (*) -mac-try-this/

  • Lorall Calculating status...
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    Apr 13, 2012 8:25 PM (in response to jswin)

    Just in case it might help others, I too experienced extremely slow peformance issues with my new iMac 27", including launchpad freezes, and nothing appearing in "All Files" within File Finder.  Tried many things, including the permissions repair, disk verification, etc., with no luck and constant beach balls.  Figured I'd limp along with it until I was able to take it to the Apple Store.  I happened to notice that my network storage device had stopped responding, so I rebooted it, which ended up resolving my all of my original issues. 

  • JBrovia Calculating status...
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    May 5, 2012 11:33 AM (in response to APierce24)

    AP24 - You are my new best friend!  Thank you so much for taking the time to share this remedy with others.  It worked!!  It's highly likely that because of you I did not pull out every single hair on my head or hurl my computer from the balcony of my home.  Prior to going on the community forum, I tried every keyword I could think of to find some help on this in Apple's Home Page 'Support' (or non-support if one were being honest) section, but to no avail.  I knew it had to do with the download of Lion and tried everything I could think of to fix it but again, nothing. I normally go to user groups first, but for some reason this time did not.  Lesson learned. 


    Again, thanks for taking the time to share this.

  • Fmontone Calculating status...
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    May 7, 2012 1:21 AM (in response to jswin)

    Even making Clean Install I've got some issues. Made Down grade, upgrade, formatted 6 times, lost access to my disks and other.


    My problem was finally solved resetting the PRAM and making a clean install again. Lion is Flying and there is no Wi-Fi issues too. Thanks god!


  • neuronatal Level 2 Level 2 (170 points)
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    May 28, 2012 11:58 AM (in response to jswin)

    Lion was unuseably slow on my 2008 MacbookPro Core 2 Duo.  Slower than a G3 machine.  I didn't have the patience for a clean install and restore, and also needed another machine capable of running some older apps (Canvas X)--so restored to a 10.6.8 Time Machine backup and the machine is flying.  IMHO, don't bother with Lion and go back to SL until they get release a proper update (Mountain Lion??).

  • CuriumUmulium Calculating status...
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    May 29, 2012 11:38 AM (in response to Fmontone)

    Thanks for posting this, Fmontone. Resetting the PRAM solved my performance problem. I had already tried repairing permissions, and moving all files from library, adding back the ones I needed. I was getting ready to do a clean install, when I tried resetting the PRAM, and that solved it.


    My symptoms where a generally slow system, even with lots of free memory and idle CPU.

  • Cyberpundit Level 1 Level 1 (5 points)

    Resetting the PRAM is not a permanent solution. It "worked" for me 2 months ago, now I'm back to square 1.


    None of the tips mentioned here will work. Disk permissions, deleting a couple of old PLIST files, redoing font caches, etc etc.


    All the funky tips in this thread -- I've read through all of them, and done all of them. Been subscribed to this thread for over a year now. Many colorful suggestions.


    NONE works. I called Apple, and their official line is clear: format everything and reinstall OSX Lion afresh. That's the only lasting solution.


    I cannot do that immediately as I have a LOT of configurations and data. Even with Time Machine, a number of personalized details such as server configs etc are not carried over, and I'm concerned Time Machine will also carry over all the settings that are causing these issues.


    So, only solution, unfortunately -- backup all data, all configs, all apps etc, and reinstall the beast.

  • Devotee68 Calculating status...
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    May 29, 2012 7:32 PM (in response to Cyberpundit)

    Time Machine is likely your problem. Buy a Passport for Mac or other backup unit. Redo a Time Machine backup. On the new device Then reformat your current backup device (Time Capsule or other). My Mac was trying to do a Time Machine save but was blocked by some incompatibility from previous SL and Lion. This solved my issue instantly! Reverted to backing up on my Time Capsule and all is perfect! I was seriously considering throwing my Mac out the window for a while. This was not a temporary's been over 2 months. Good luck!


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