How do uninstall Mountain Lion OS

How do I uninstall Mountain Lion and go back to Snow Leopard

Downgrade Lion/Mountain Lion to Snow Leopard
1.  Boot from your Snow Leopard Installer Disc. After the installer loads select your language and click on the Continue button.  When the menu bar appears select Disk Utility from the Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area.  If it does not say "Verified" then the drive is failing or has failed and will need replacing.  SMART info will not be reported  on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Quit DU and return to the installer. Install Snow Leopard.
This will erase the whole drive so be sure to backup your files if you don't have a backup already. If you have performed a TM backup using Lion be aware that you cannot restore from that backup in Snow Leopard (see below.) I suggest you make a separate backup using Carbon Copy Cloner 3.4.1.
If you have Snow Leopard Time Machine backups, do a full system restore per #14 in Time Machine - Frequently Asked Questions.  If you have subsequent backups from Lion, you can restore newer items selectively, via the "Star Wars" display, per #15 there, but be careful; some Snow Leopard apps may not work with the Lion files.

Similar Messages

  • How to uninstall mountain lion

    How to uninstall mountain lion?

    Backup your files, erase the hard drive, install an earlier version of OS X.
    Downgrade Lion/Mountain Lion to Snow Leopard
    1.  Boot from your Snow Leopard Installer Disc. After the installer loads select your language and click on the Continue button.  When the menu bar appears select Disk Utility from the Utilities menu.
    2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area.  If it does not say "Verified" then the drive is failing or has failed and will need replacing.  SMART info will not be reported  on external drives. Otherwise, click on the Partition tab in the DU main window.
    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.
    4. Quit DU and return to the installer. Install Snow Leopard.
    This will erase the whole drive so be sure to backup your files if you don't have a backup already. If you have performed a TM backup using Lion be aware that you cannot restore from that backup in Snow Leopard (see below.) I suggest you make a separate backup using Carbon Copy Cloner 3.4.1.
    If you have Snow Leopard Time Machine backups, do a full system restore per #14 in Time Machine - Frequently Asked Questions.  If you have subsequent backups from Lion, you can restore newer items selectively, via the "Star Wars" display, per #15 there, but be careful; some Snow Leopard apps may not work with the Lion files.

  • How to uninstall Mountain Lion Server

    I recently had to uninstall OS X Server (version 2.2, for Mountain Lion, not the earlier Server for Lion), and I couldn't figure out how. Here's what worked:
    Start Applications/Server.
    Turn off all services that are running.
    Quit out of Server.
    Drag Applications/Server to the Trash.
         Doing so will cause an alert to pop up, saying that removal of Server has been detected. Okay that.
    Drag Macintosh HD/Library/Server to the Trash.
    Restart.
    I had to uninstall because I was trying to use Migration Assistant to copy everything to a new machine, and it refused to do so as long as Server was installed.

    Most of the world uses Linux or Windows Server, and that's why Apple doesn't put their highest standard of effort into OS X Server... And because of that, most of the world uses Linux or Windows Server, it's a Catch 22.
    Nevertheless, it is the best solution for managing an array of Apple devices, especially corporate iPads, I can think of nothing else that lets me do all of the things OS X Server lets me do.  Granted, I have a bunch of Apple products, I'm sure if I had a bunch of Android and Microsoft products, I'd be using Windows Server instead.
    Like I said though, if more people used OS X Server, I'm sure Apple would put more effort into it.  Heck, if they charged more for it, if that's what it takes for them to make it competitive with Windows Server, I'd pay the premium.
    @MeatyChi,
    You can copy the Server app from any Mac and put it on Another Mac.  Don't worry about the Library/Server directory, that's automatically created when Server.app runs its first-use operations.

  • HT201321 how to uninstall mountain lion

    how to unintall mountain lion

    If your Mac shipped with installation disc(s) just use the first (or only) disc and boot from it, erase your hard drive, and install your old OS on it. If it shipped with Lion, hold down the Command, option/alt and R keys whilst booting and erase the disk and reinstall Lion.
    Pretty simple.
    Clinton

  • How do I uninstall mountain lion and reinstall snow leopard

    If I had known that I would not be able to use my excel files I would not have purchased OSX Mountain Lion.  Is there a way to uninstall mountain lion and reinstall snow leopard?
    Thank you,

    To get more to the point the answer is the only way to go back to SnowLeopard is if you have a complete backup of your system from before the upgrade.
    If you do you would boot off your original SL DVD wipe the disk and install SL and then restore from your SL backups.
    Short of that here is no way to go back. But as the others have offered there are other less drastic means to deal with the problem.
    regards

  • Uninstall mountain lion and reinstall lion

    how can i uninstall mountain lion and reinstall lion please i have no disks

    https://discussions.apple.com/docs/DOC-1948

  • So I just got OSX Mavericks... Do I need to uninstall Mountain Lion now to free up space?

    My memory clean application is telling me my memory is low after installing Mavericks. I want to uninstall Mountain Lion if possible. How would I do that?

    Memory is different from storage space. If you ran through the upgrade process then Mavericks was installed over Mountain Lion. Open Applications>Utilities>Activity Monitor and select Memory. Something is using up your memory and this is a way to find out what application or process is the culprit.

  • I was using OS Snow Leopard and on 8/1/13 I downloaded Mountain Lion and found out it was not compatible with my HP printer (HP photosmart C5580) so I called Apple and asked how to get Mountain Lion off and Snow Leopard back on.  The Tech told me to

    I was using OS Snow Leopard and on 8/1/13 I downloaded Mountain Lion.  Then I found out it was not compatible with my HP Printer (HP Photosmart C5580 all-in-one) so I called Apple support and the tech told me to erase the hard drive instead of going in the time machine.  Well I did that and then it took about three hours three days a week for about three weeks on the phone with an apple tech to get all my stuff back on my computer.  I have had trouble with my printer (won't do the scan anymore and wasn't printing on my DVDs.  Also the computer keeps freezing up when it is in the sleep mode, etc.
    When I tried to list my problem on this forum it lists your OS at the bottom and mine had Mountain Lion listed as what I was using so apparently it didn't erase it.  Want to know how to get Mountain Lion off and put my Snow Leopard on so things start working right.

    Go to the  menu/About This Mac - what OS version shows there?
    Do a backup, preferably 2 separate ones on 2 separate drives.
    Revert to a Previous OS X
    Revert to Snow Leopard
    If you do revert, I'd use Setup Assistant to restore your data. This process takes a while, so do it when you won't need the computer for several hours, based on my experience.

  • How to resize mountain lion os boot partition

    how to resize mountain lion os x ver.10.8.5 boot volume partition.
    how to install ms-office application on partition that is not boot volume partition.

    Disk Utility > Internal Disk Drive > Partition > Click the "+" symbol to add a partition > Apply

  • How to update mountain lion

    i dont know how i update mountain lion. i have osx 10.7.5. i dont know how i get osx 10.8.3?

    Welcome to the Apple Support Communities
    OS X Mountain Lion is a paid version, so you can't get it from Software Update.
    First, make a backup of your data, just in case the upgrade fails. Then, check that your computer is compatible with OS X Mountain Lion > http://www.apple.com/osx/specs If it's compatible, open the App Store and purchase OS X Mountain Lion.
    The OS X Mountain Lion installer will be downloaded. It takes 4 GB, so this may take hours. When it finishes, the Mountain Lion installer will show up, so follow the steps to upgrade to Mountain Lion

  • How long does mountain lion take to download?

    On average how long does mountain lion take to download from the app store?

    Always keep an eye on 'More like this', the column to the right of your initial post.    You will often find answers and direct leads to your questions there.
    In fact it relates to your ISP and the download speeds you have.   I believe it is 4GB in size.

  • How long does mountain lion take to download and where does it say how much it has left mine just says downloading ?

    how long does mountain lion take to download and where does it say how much it has left mine just says downloading ?

    It's totally dependent on your broadband speed.
    It took me about 45 minutes to download, but I have a reasonably fast connection.
    It will often say in the purchased pane of the Mac App Store how much longer it will take.

  • How well will Mountain Lion run on the following MacBook Pro?

    Thinking about biting the bullet and upgrading to Mountain Lion on my MacBook Pro. My specs are as follows:
    MacBook Pro 15"
    (Late 2008 model MacBookPro5,1)
    Intel core 2 duo 2.53Ghz
    8GB RAM
    1TB HD with 390GB free
    Mac OS X 10.6.8
    So, how well will Mountain Lion run on this configuration? Currently I'm finding my computer annoyingly slow, so am wondering whether an upgrade was worth trying or not?
    Any advice would be most appreciated!
    Thanks!
    Joe.

    Sorry, I should have been clearer - that's what I was thinking, which is why I was asking the question. I thought that if I was going to all the effort of a reformat etc that I should just upgrade to Mountain Lion while I was at it, but didn't want to do that if it was going to run really slowly anyway and then have to go through it all again to go back to Snow Leopard.
    etresoft wrote:
    .... Mountain Lion should run fine on that machine.
    So, have you had any personal experience of Mountain Lion running fine on this MacBook Pro? I know that officially it will run, but I'm wondering about the "real life" experience of it running on this model.
    Anyone out there able to share their expeience?

  • Currently i am using a windows7 installed machine with following configurations intel core i5 2.60Ghz with Ram 8gb.(64 byte).I would like to install Mountain lion osx in my windows machine.Pls tell how to  install  mountain lion osx in my windows machine?

    Currently i am using a windows7 installed machine with following configurations intel core i5 2.60Ghz with Ram 8gb.(64 byte).I would like to install Mountain lion osx in my windows machine.Pls tell how to  install  mountain lion osx in my windows machine?

    Please stop asking about that on this forum.
    There are plenty of informations on the Internet if you want to do it but nobody here will help, because is against the forum's rules.
    And, you can't buy Mountain Lion if you do not have a Macintosh with at least Snow Leopard installed.
    There is no physical media. Mountain Lion is provided by Apple through the Mac App Store.

  • How to purchase mountain lion os?

    Hello Tech Guys,
    i have purhased a used mac book pro without OS, so i need help in how to purhase Mountain lion OS.
    Thanks & Regards

    Or check out KB Article:  http://support.apple.com/kb/HT1159 Mac OS X versions (builds) for computers 

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