Major slow down after installing mountain lion

....just my bought my new Mac last Christmas ,coming from Windows was a major change,everything was fast,
then a few days ago I upgraded from OS Lion to Mountain Lion and now everything slow down a lot.
Everything a try to open from internet browsers to apps,it takes from 30 seconds up to 1 minute and a half.
Is there anything I can do to return to OS Lion and have the same speed as before?

Did you run a Time Machine back up before you updated?

Similar Messages

  • System slow down after installing Mountain Lion OS

    I recently purchased a MacBook Pro for school, and upgraded the OS to Mountain Lion.  I noticed a slight slow down in the computer.  Is this normal, or is there something I can do to speed it back up?
    SW

    Your processor is alright however the specs on your machine are lackluster.  It has a slow drive and not enough ram.  Your first problem is that with that little ram the computer will use the drive for paging.  Since the drive is 5400 (the slowest hard drives in the world) your going to be waiting.. a lot.  Up your ram and upgrade to a 7200 rpm hard drive youll be happy.  If you really want a gem system upgrade to 8gb ram and get a swift SSD drive. 
    Its a technology problem, not an OS problem.  Newer OS's have extra features that capitalize on modern tech.. 5400rpm tech are like.. 90s tech...   Cant believe they were selling those right up to 2011 or whenever.. criminal...

  • My mac mini doesn't shut down after installing mountain lion?

    Right after i installed mountain lion and checked all the new features, I closed all applications, clear ram, clear cache, clear print queue, made sure that nothing was running when i logged out(only one 1 user was logged on.) I shut down and it seemed normal until the mac mini restarted, saying there was a problem and the normal error report appeared on screen when everything rebooted(after I log back on.) I'm angry. Really what should I do, I just bought this on December 2011( i7 mac mini sandy bridge) of last year. I hope apple releases an update to fix this problem.
    My first attempt was to go to disk utility and fixed it, it worked I was able to shut down. However after that it started to go back to the way it was and it still wont shut down. Yes Im able to do everything else like put the hardrive to sleep(yes it goes to sleep I made sure) and force closing applications. Right now Im going to attempt doing what I did before but I will appreciate if a representaive or an apple veteran would give me advice or some useful information on how to fix this problem.
    This happened 8/18/2012 at 6:57(when I installed Mountain lion and checked.)

    Open > http://www.reedcorner.net/understanding-upgrade-nightmares/

  • Macbook randomly shuts down after installing Mountain Lion.

    I have a late 2008 Aluminum Macbook; as of last week I have installed Mountain Lion finally and I've come across a rather irritating problem: the laptop keeps randomly shutting down. I've noticed it primarily likes to go down when the battery is at 89%. I've never had battery trouble before, this happens even when the computer is not over-heating, so I'm fairly certain it's not a battery issue. After restarting the computer all the applications I was using are still open and any progression I had made on documents have been saved since the time of the crash.
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    Hi ppl again :)
    I found that screen is not disabled, it is only have a very low brightness. So I begin to wait because I saw that actually installer is still running. Finally, Mas OS was installed and after that I change brightness using keyboard (it didn't worked while installation). Now all is ok. I also tried to reboot and system loaded correctly.
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  • Internet down after installing mountain lion

    I just upgraded to Mountain Lion, and now I'm getting a message that my DNS lookup failed when I try to load a web page. My internet is working properly otherwise. I did enter the open DNS values
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    Hi, this has worked for a few...
    Make a New Location, Using network locations in Mac OS X ...
    http://support.apple.com/kb/HT2712
    10.7…
    System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
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  • My wifi is very slow after installing mountain lion on my Mac book pro

    My wifi is very very slow after installing mountain lion on my MacBook pro.
    What can I do?

    Ha  ha, I misread that as "My wife is very slow after installing mountain lion on my Mac book pro"
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  • After installing mountain lion i lost my pictures in iPhoto, lost my music in iTunes, internet became very slow. What can I do to fix this issues

    after installing mountain lion I lost pictures in iphoto, lost my musisc in itunes, my icluod is not working, internet its very slow and some other issues. There is a way how to fix these issues

    Open System Preferences > iCloud
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  • Slow down after installing Lion OS

    My Macbook pro later than 2009 model slowed down after installing the new OS Lion
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    First suggestion ,there have been a number of identical user questions like yours, in the Lion Community. If you want to talk to other MacBook Pro owners, try the forum they have.
    http://www.apple.com/support/macbookpro
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  • My macbook pro is very slow after installing mountain lion

    my macbook pro is very slow after installing mountain lion?  Is anyone else having this issue?

    If you don't use an SSD and bump your RAM up to 8 Gb's you may experience slow speeds, but I noticed slow speeds with your general configuration in SL.
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  • After installing Mountain Lion doesn't external hard drives mount or stay mounted. Anybody else with this major problem?

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    I have the same problem, although mine has not been solved by ESET update, finder settings, PRAM & SMC resets or anything else.
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    Hi Jeff,
    Tried to reply with my iPhone but not easy! Anyway, back on the laptop now. Yes the crash was bad but Tek support at Prism Sound was really good. In the end I rebuilt the whole system on a new disk which took a couple of days with all the plugins, softsynths etc.... but there seemed to be no alternative in my case, and this was agreed with Prism sound as being the only alternative left to me. I still don't really know what caused the crash but ML and Orpheus are both working fine now. Let's face it, you'll have to update at sometime..maybe best to pick some time between projects On balance, I suspect that my problems were unique to my system and that your installation will go ok.
    Hope it goes well,
    Rick

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  • Outlook (MS Office for MAC2011) appears to be using up to 67% of my CPU time even when I'm doing nothing.  Also, immediately after installing Mountain Lion, log-ins to the OS and normal operations noticeably slowed.  Suggestions?

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    Uninstall Office and reinstall it
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