Need help uninstalling Mountain Lion and going back to Lion.

I have just installed Mountain Lion. I am having serious compatibility issues with Matlab, though, and I want to reinstall Lion so that I can work in Matlab. I do not have a recent enough time machine backup of Lion, and I bought Lion from the app store. When I try to re-download the Lion installer from the app store, it says "You can’t upgrade this version of Mac OS X because a newer version is installed." How can I get Lion back?

Did you by chance create a USB thumb drive with the Lion Recovery HD on it? Hopefully you did. If so, you can boot from that thumb drive and you will see the Lion logo for the Reinstall Mac OS X selection on the Utilities menu.

Similar Messages

  • How can I quit mt. lion and go back to lion

    how can I quit mountain lion and go back to lion

    Please look over the system requirments for Lion, if your system meets or exceeds those specifications then disregard the advice you were told.
    General Requirements
    OS X v10.6.8 or later
    2GB of memory
    8GB of available space
    Some features require an Apple ID; terms apply.
    Some features require a compatible Internet service provider; fees may apply.
    Supported
    Models
    iMac (Mid 2007 or newer)
    MacBook (Late 2008 Aluminum, or Early 2009 or newer)
    MacBook Pro (Mid/Late 2007 or newer)
    Xserve (Early 2009)
    MacBook Air (Late 2008 or newer)
    Mac mini (Early 2009 or newer)
    Mac Pro (Early 2008 or newer)

  • How do I uninstall mountain lion and go back to lion, how do I uninstall mountain lion and go back to lion

    Please help!!! I dont like it!

    The installer may do squirrelly things in an upgrade like nip and tuck the code, turning Lion into Mountain Lion.  The best option is to do a fresh install.  Do a Time Machine backup of your files (you can probably exclude the system folder and apps - just download them again from the App Store).  Concentrate on your home folder - iTunes files, your library folder, iPhoto library, etc.  Re-download Mountain Lion from the App Store.  If the installer starts, quit the app.  Now go to your Application folder and find the Mountain Lion installer.  View the contents of the package and go to Contents:SharedSupport:InstallESD.dmg.  Drag the .dmg file to your desktop or someplace else convenient.  Next, open Disk Utility and burn the disk image to an 8 GB DVD or flash drive.  If you burn it to a flash drive, you may get an error saying the burn failed.  If it burned for a while, long enough for the image to actually copy over, ignore it.  Reboot your Mac whole holding down the Option key with the flash drive in a USB port or DVD in the drive.  You should get the option to boot from that drive.  Select the Mountain Lion DVD/USB option to test the boot.  You can then either continue the installation or quit the installer until you're ready.
    If you purchased Lion from the App Store previously, there doesn't seem to be a way to download Lion within Mountain Lion. You may have a friend with either Lion or a newer Mac with Snow Leopard installed, if so, you may want to login to their App Store, download it, and try to install Lion that way.  If you bought your Mac with Lion preinstalled, you won't be able to download Lion at all.

  • Help deinstalling Snow leopard and going back to Tiger OSX10.4.11

    I have just reinstalled Tiger OSX 10.4.11 on my IMac as snow leopard made my machine to slow and crash too often. Now that I have, I cannot seem to open Iphoto. I know my photos of in the memory as I can see them on the previous system file. But I cannot open Iphoto? Can anyone help me with this please?

    Hi twosparks, and a warm welcome to the forums!
    Could be many things, we should start with this...
    "Try Disk Utility
    1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
    2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
    *Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
    3. Click the First Aid tab.
    4. Select your Mac OS X volume.
    5. Click Repair. Disk Utility checks and repairs the disk."
    http://docs.info.apple.com/article.html?artnum=106214
    Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
    (Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
    If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.
    The usual reason why updates fail or mess things up, is if Permissions are not fixed before & after every update, with a reboot... you may get a partial update when the installer finds it doesn't have Permissions to change one obscure little part of the OS, leaving you with a mix of OS versions. (Well, the Installer actually uses superuser Permissions to do it's work, but after reboot it doesn't guarantee communication with other existing needed files Permissions.)
    Some people get away without Repairing Permissions for years, some for only days.
    If Permissions are wrong before applying an update, you could get mixed OS versions, if Directory is the slightest messed up, who knows!
    If many Permission are repaired, or any Directory errors are found, you may need to re-apply some the latest/biggest updates.
    May even need to do an Archive and Install if you have room on the HD, but saves all your files and gives a new OS...
    http://docs.info.apple.com/article.html?artnum=107120
    I only use Software Update to see what is needed, then get them for real via...
    http://www.apple.com/support/downloads/
    That way I can wait a week or so, check the forums for potential problems, and get Permissions & such in order before installing.
    If all the above fails, then it appears to be time for a relatively painless Archive & Install, which gives you a new/old OS, but can preserve all your files, pics, music, settings, etc., as long as you have plenty of free disk space and no Disk corruption, and is relatively quick & painless...
    http://docs.info.apple.com/article.html?artnum=107120
    Just be sure to select Preserve Users & Settings.

  • After update to Lion and going back to snow leopard, iWeb doesn't recognize my website

    I upgraded to Lion thinking my files were backed up on MobileMe as set up.  After finding out most of my favorite programs had no upgrade to Lion, I had to erase my hard disk and re-install Snow Leopard.  Some of my programs don't work now and iWeb won't recognize my personal website, so I can't update it.  What and how do I correct this issue?  I also can't get my printers working in spite of numerous re-installs of their software and internet updates.  HELP!

    The critifcal file to have for iWeb to work on your websites is named Domain.sites2 and is located in your Users/Home/Library/Application Support/iWeb folder. 
    If you don't have a backup copy of that file you will have to rebuild your sites from scratch. Chapter 2.3 on the iWeb FAQ.org site has tips on using some of the existing files, image, audio, video, etc., from the published site in the creation of the new site.
    OT

  • I need to uninstall firefox 6 and go back to firefox 5 as avast doesn't work

    I just found out about this after the upgrade. I need to go back to version 5. until this is resolved - how do I do this

    I found this solution http://objcsharp.wordpress.com/2014/09/21/how-to-get-back-the-ios-7-sdk-after-up grading-to-xcode-6/

  • Has Apple done anything to address the issue of Mountain Lion's inability to support Epson printers? I have a Stylus Photo RX620 that now is useless. I am not a computer geek so would rather not try to do an uninstall of Mt. Lion and go back to S.Leopard

    Has Apple done anything to address the issue of Mountain Lion's inability to support Epson printers? I have a Stylus Photo RX620 that now is useless. I am not a computer geek so would rather not try to do an uninstall of Mt. Lion and go back to S.Leopard

    Have you tried to open System Preferences, then Print & Scan and then try to Add + a printer?
    I have an Epson RX580 and am using OS X 10.8.2 and it is working as a (Bonjour) printer.  My Epson RX580 is plugged into my AirPort Extreme and I can print over my wireless network to the RX580.  However, I do not see any Scan options with this setup.
    Anyone know anything about getting the scanning portion of the RX580 to work over the network like the printing function does with my Airport Extreme?  Or can I not "share" a scanner over the USB port on the Airport Extreme?  I know, kind on topic/off topic - but I think it fits under OS questions better. 
    Thanks for your advice!
    Randy
    image added by: randynchicago

  • I have a sonos music system that does not yet work with Lion and will not for about 3-weeks.  I need to uninstall lion and go back to snow leopard, how do I do that?

    I have a Sonos music system that is not yet compatible with Lion and will not be for several weeks.  How do I uninstall Lion and go back to Snow Leopard?

    While we all have MacBooks only a few have Lion. There's a Lion Support Community. You should also post this question there. https://discussions.apple.com/community/mac_os/mac_os_x_v10.7_lion

  • How do I erase mountain lion developer preview and go back to Lion 10.7? I do not have lion or data backed up on my Air

    How do I erase mountain lion developer preview and go back to Lion 10.7? I do not have lion or data backed up on my Air
    I need a step by step instructions since I have never done this before, willing to set up partition if needed.

    If you installed Lion from the Mac App Store or got it with the computer, restart with the Option key held down and see if its recovery partition still exists; if it does, tab to it, use the Disk Utility on it to erase the Mountain Lion partition or repartition the drive, and install Lion onto the blank partition. If you installed Lion from the USB thumb drive, use that.
    (65131)

  • Dear Friends, My Iphone 4s is stuck in recovery mode while trying to update to iso 6. I tried restoring it but unable to do so. gives me error 36 and goes back to recovery mode. I tried all the steps but no luck. anyone? Please Help!!!

    Dear Friends, My Iphone 4s is stuck in recovery mode while trying to update to iso 6. I tried restoring it but unable to do so. gives me error 36 and goes back to recovery mode. I tried all the steps but no luck. anyone? Please Help!!

    This writeup comes from the article referenced below it:
    Error 1 or -1
    This may indicate a hardware issue with your device. Follow Troubleshooting security software issues, and restore your device on a different known-good computer. If the errors persist on another computer, the device may need service.
    http://support.apple.com/kb/TS3694#error1

  • Will uninstalling Mavericks and reverting back to Lion restore iMovie to 9.0.0?

    I’m someone who regularly uses iMovie to edit videos for YouTube, and given that my iMovie 9.0.4 recently decided to go bonkers beyond repair, I can no longer use it, for it’s no longer on my Mac.
    In short, iMovie 10 is an utter disgrace, and I want iMovie 9 back. Now, in order for me to get iMovie 9 back, will uninstalling Mavericks and reverting back to Lion (a better OS in my opinion anyway) return iMovie to its former glory? My Mac didn’t come with a disc, so how would this work?
    Thanks for any help can may be provided!

    You should still have iMovie9 in a folder after Mavericks upgrade.  It did not delete it.  Check your applications.

  • Please help.. I have just tried to install lion on my iMac and it can't complete because of 'disk error'.. can i delete lion and go back to leopard as there was no problem there?? can't get past grey screen

    Please help.. I have just tried to install lion on my iMac and it can't complete because of 'disk error'.. can i delete lion and go back to leopard as there was no problem there?? can't get past grey screen

    Just restore your bootable backup/clone or Time Machine backup.

  • Need help uninstalling photoshop and reinstalling

    need help uninstalling and reinstalling photoshop

    And why do you think you need to reinstall?  What is happening?

  • Need help FLASH not launching and not uninstalling "licensing for this product has stopped working".

    Need help FLASH not launching and not uninstalling "licensing for this product has stopped working" and " you can only install one adobe product at a time please complete the other installation"  Flash was working absolutely fine before, I have no idea why this happened.

    I am having similar problem.  Can't open any of CS3 programs after trying to download Dreamweaver Trial, which wouldn't work because "couldn't remove DLM extention" error message.  So now I can not run Illustrator, Photoshop, or even Adobe Reader.  These are properly licensed for about a year. I get "License for product has stopped working".  Have 2 pending cases open with Adobe support (one for Dreamweaver trial, one for license problem) since 8/3 with NO ANSWERS - It says answers within 1-3 business days.  Was on phone support hold today for over 3 hours before line went dead with no help.  What is up with adobe support?  Can anyone help?

  • Is there anyway I can get rid of Lion and get back to Snow Leopard?

    Is there anyway I can get rid of Lion and get back to Snow Leopard?

    Back to Snow Leopard from Lion install method
    Read and print out these instructions, your computer is going to be offline and you wil be cutoff from help until your machine is restored.
    Clear the Desktop, Downloads and Trash of anything you wish to keep by placing their files in the respective Documents, Music, Pictures, Movie folders.
    Disconnect other drives except the sole backup drive.
    Backup ALL your Users folders (Documents, Pictures, Movies, Music etc) manually (drag and drop methods) to a (not TimeMachine) external powered drive (HFS+ journaled formatted in Disk Utility) and disconnect, your going to be wiping the entire boot disk of ALL DATA.
    (warning, everything will be gone and not recovered, OS, programs, files, Windows etc all gone.)
    Note: You might want to hold c and boot off the 10.6 installer disk and use Disk Utility to format the new blank external drive instead of using OS X Lion if that's hosed. Then reboot into Lion and copy files, may be safer that way.
    Here we go!
    Hold c and boot off the 10.6 installer disk that comes with your computer and second screen in just STOP there, don't install OS X yet.
    Look at the Utilities Menu for Disk Utility.
    On the left is the name of your hard drive maker, click it and Erase (format HFS+ Journaled), give it the same drive name as before, and click Erase...
    (note: if you want to "scrub" the drive of old files that haven't been overwritten yet, then use the Security Option > Zero Erase, takes a lot longer)
    This should wipe the drive of ALL partitions (GUID, OS X and 10.7 Recovery, Windows if present)
    When it's done, quit and install OS X 10.6. Then install all your programs from fresh sources and validate/update.
    When you setup a first account, use the same user name as before, this way you can simply drag and drop the content of your previous Users folders from the external drive right back into the new Users folders and everything should work peachy. Links in iTunes to music, playlists and iPhoto links especially.
    Update OS X to 10.6.8 using the Combo Update for best results.
    http://support.apple.com/kb/DL1399
    (Note: If your original machine had 10.5 and you want the free iLife that comes with the disks with the computer, then you'll have to install 10.5 first using the same c boot/erase/format methods as above, then update to 10.6 via the disk, then Combo Update 10.6.8)
    Final step optional but highly recommended.
    A lot of people use a Carbon Copy Clone of their boot drive to a new HFS+Journaled external drive (used only for this purpose) as a "hold the option key" bootable backup in case something goes wrong with their boot drive or need to restore to a previous OS X version..  (in addition to TimeMachine drive for more immediate backups.)
    It's not advised to have a Bootable Clone and a TimeMachine partition on the same external drive, as two drives gives hardware protection in case one fails.

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