How to uninstall Lion and restore Snow Leopard?

I did upgrade from Leopard to Lion 10.7.1 two days ago. After that my 2.8 GHz Core i5 4GB DDR3 start to jerking, I sometime even start any applications. That is never happen before when running on Leopard. I can not work for two days already. Anybody can teach me how to restore my iMac to Leopard without harming data stored?

Kappy has a nice writeup, but basically.... back up your data, boot from your Snow Leopard DVD (hold C), go into Disk Utilities and erase your Lion partition. After that completes, back out of Disk Utilites and install Snow Leopard, reinstall your apps and restore your data.

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Anyone know how to uninstall Lion and reinstall snow leopard without having to pay the $29?

Ever since I purchased and downloaded Lion I have been having problems (applications not running properly or not at all and the computer locks up like every 10 minutes resulting in me having to restart) and want to go back to snow leopard until I feel comfortable that Lion is ready to go.

Thanks Roscoe . . . .
I came back to this forum to share my experience. I'm working with a 2007/08 - 17" MB Pro. With the LEOPARD OS, not Snow Leopard. I used my original discs and reformatted, reinstalled Leopard. I was able to open Time Machine and restore the files saved on on an external drive. I used this time to make changes to my Apps, and having just doubled my RAM prior to the 'Lion Upgrade', had no issues of slowing or freezing as others are apparently having. Like you, this was relatively painless, though it did take some time to transfer all of my files.
I hesitated performing this process for nearly a month, but kept checking my back-ups to ensure that I had still some saved from the Leopard days. Unfortunately, I was unable to do much of anything. I'm a graphic designer and sell items online, EVERYTHING came to a complete stop with Lion. I couldn't communicate with my printer at all, no fax, no copies, no prints, no scans. I couldn't download images from my camera. Some of my Apps, stopped working, I hated the missing 'Save As' feature. My image viewer and browsers crashed constantly, and my home network 'LOST' me! I couldn't take another day of NO productivity!
My advice to anyone changing or upgrading ANY O.S., whether Mac or PC, always; ALWAYS back up your drive first! We should be backing up often anyway, but it is certainly important to ensure the security of all of your files and program downloads or installations by copying everything prior to making any hardware or software changes. For a small investment of $50 to $100, you can get an external drive. Having the capability of restoring all of your data is . . . priceless!
Thanks everyone for sharing. Good luck to those experiences these problems. Have Faith, Apple will fix it's issues, and the other manufacturers WILL catch up on the driver codes. We all just need to be patient, until then; keep on 'backing up'!
*** JJ; were you able to restore an earlier back up? Did that fix your issue? I found a great deal on RAM from Crucial, sometimes this will help increase our speed and performance . . . . just a thought.
Christi

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

I have Leopard 10.5.8. How can i download and install Snow Leopard or Lion? Thanks.

Currently, I have Leopard 10.5.8. How can i download and install Snow Leopard or Lion? Thanks for your help.

You need to *call* Apple at 1-800-MY-APPLE, as Ralph already said.
But "since one week" sounds like a direct translation of French "il y a". You should call your local country's Apple suuport and ask.
Here is Amazon, from a "snow leopard buy" Google search: http://www.amazon.com/Mac-version-10-6-3-Snow-Leopard/dp/B001AMHWP8

HELP! How do I remove Lion and reinstall Snow Leopard and my files

HELP! How do I remove Lion and reinstall Snow Leopard & my files BUT I just discovered my Apple Time Capsule which was using Time Machine DIED
I had to go to MacMall and have the Time Capsule data transfered to a new BAK drive($300+$300)
(The Apple Store sent me there as they said they do not do data transfer)
Now what do I do?
? ? One Senior advisor said that I will have to drag and drop the data file or files? from the Time Capsule BAK drive back to my iMAC but will that include all the Snow Leopard operating system ?
? ? Another senior advisor said I will have to wipe my hard drive then install Snow Leopard then "drag and drop", ? ??
All my business leases, database, spreadsheets. letters, mail merge files, and so on are not available with Lion -
I AM VERY ANGRY AS I NEVER SAW THAT WRITTEN ANYWHERE !!!
I am seriously confused and I AM SCARED TO MAKE A MISTAKE-HELP !!
WHAT DO I DO ? AND IN WHAT ORDER? PLEASE HELP!

Your post is confusing to read too.
It sounds like you still have your files on your Mac. Why do you want to back track to Snow Leopard on your Mac? Why can't you read your files from your Mac? If your files are on your Mac, why are you taking them off your broken Time Capsule? You don't have to install Snow Leopard to transfer your files back to your Mac. Maybe step back a bit and explain your situation a little better with details. For instance, what's a BAK drive? Suggest you explain what you are trying to do?
Before you do anything, create a backup of your Mac to another disk drive.. suggest you use Carbon Copy Cloner to make another copy of your Mac.

How do you erase Lion and reinstall Snow Leopard

I want to remove Lion and reinstall Snow Leopard. I put the install disc in and clicked Install so that I could get to the disc utilities. Got a reading that this version of OS X cannot be used on this computer. I'm using a mid-2010 15" MacBook Pro. I don't have any backups made, but I am not worried about that...I just want to go back to using Snow Leopard. Lion has too many quirks I don't want to put up with. Any suggestions?

Downgrade 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 can I uninstall Maverick and reinstall snow leopard? My mac hasn't been the same since I upgrading to maverick. Runs slow, crashes, can't cope with normal functions.... Help, please help

How can I uninstall Maverick and reinstall snow leopard?
My mac hasn't been the same since I upgrading to maverick. Runs slow, crashes, can't cope with normal functions....
I need to go back to leopard or buy a new MacBook Pro!
Help, please help

Revert to a Previous OS X
Revert to former OS from Mavericks
Revert to Snow Leopard

HT3910 How do I erase Mountain Lion and reinstall Snow Leopard?

Can anyone help me erase Mountain Lion and reinstall Snow Leopard. When I had installed Mountain Lion,I discovered that my music notation program, Overture was not working with Mountain Lion. Please help me, years of work is for now lost.

Back up your data files.
Use the Snow Leopard installer disc to completely erase your hard drive and everything on it.
Re-install the SL operating system, then all your applications, then your data files.
If you happened to make a bootable backup clone of your hard drive before installing Mountail Lion then you can just clone the backup back to your drive.

How can i download and install snow leopard 10.6 on my mac?

how can i download and install snow leopard 10.6?

If you need to purchase Snow Leopard contact Customer Service: Contacting Apple for support and service. The price is $29.00 plus tax. You will receive physical media - DVD - by mail.
Third-party sources for Snow Leopard are:
Snow Leopard from Amazon.com
Snow Leopard from eBay
After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store.
Snow Leopard General requirements
Mac computer with an Intel processor
1GB of memory
5GB of available disk space
DVD drive for installation
Some features require a compatible Internet service provider; fees may apply.
Some features require Apple’s MobileMe service; fees and terms apply.

Need to reformat HDD running Mountain Lion and install Snow Leopard

I bought a new Retina Display MBP and want to sell my Late 2008 MBP.
My 2008 MBP is running Mountain Lion, but I want to format the HDD and install Snow Leopard. When I try installing Snow Leopard from the DVD, I get the following message: "You can;t use this version of the application Install Mac OS X.app with this version of Mac OS X."
How can I get this done?

The only way to do it is to boot from the Snow Leopard installer disc and the erase and install. In other words you cannot "downgrade" OS X 10.6 over top of 10.8. Besides, if selling it an erase and install is the best thing to do anywya - gets all your info off it.

How to uninstall lion and re-install snow leopard

i just insalled LION and found out that adobe premier pro CS4 will not work with it. need to go back to Snow Leopard. how do i do that?

See Kappy's going back to SL from Lion guide.

How to back up and reinstall Snow Leopard

My computer keeps crashing. It's mainly to do with items that are flash based, like double clicking flvs, flash being on a website. Sometimes even mail crashes too though.
I have tried rebuilding the directory with diskwarrior but it is still doing it. So I thought I would uninstall and reinstall everything. My only concern is how do I make sure everything goes back on afterwards properly? I do have an external HD, so I am assuming I can use that but I'm not sure how. Would I lose anything in the process?

First of all, how much free space is there on your hard drive? You should have at least 10% of its total capacity free for proper OS X operation.
Assuming this is true, try this:
Create a new, temporary user account for testing purposes. Log out of your normal account & into this one. Do you still see the same behavior with Safari, Firefox, etc.? If not, something in your home folder is the problem, possibly bad preference files or an incompatible login item.
Also check your Internet Plugins in /Library/Internet Plug-Ins (the root level Library folder, not your user one). Make sure you have up to date ones -- for Flash Player, the latest is version 10.0.45.2. (You can see what version you have installed by visiting http://www.adobe.com/software/flash/about/.)
For other issues, it may be that you have added some "enhancement" software that is not compatible with Snow Leopard. In particular, be suspicious of anything that adds an icon to the right side of the menu bar that did not come from Apple & can be command-dragged to a new position among the Apple ones.
Also check /Library/StartupItems. It is empty by default. Anything in it may be incompatible with Snow Leopard.
Do this much & reply with what you have found. There is more to try but this is a good start.

Can I upgrade to mountain lion and skip snow leopard from my OS X 10.6.8?

Hi guys, Im not sure on this thus any one can advice me on this?
I'v missed the snow leopard upgrade and now came the mountain lion; can I just upgrade and down the m.lion directly? Or do I need the snow leopard in order to install the mountain lion?

Mac OS X 10.6.8 is Snow Leopard and can be upgraded directly to Mountain Lion 10.8 without going through Lion 10.7.
(70239)

Can i uninstall yosemite and reinstall snow leopard

Is It possible to uninstall yosemite and to reinstall snow leopard.I am not happy with yosemite.

Hi Alan I have this problem also and have done the etrecheck here it is. Please be patient with me as I'm not a computer person.
Problem description:
Hi I have just downloaded Yosemite and it has slowed my laptop down I am considering uninstalling and re installing snow leopard.
EtreCheck version: 2.1.8 (121)
Report generated 13 April 2015 5:55:39 pm AEST
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
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Hardware Information: ℹ️
    MacBook Pro (17-inch, Early 2008) (Verified)
    MacBook Pro - model: MacBookPro4,1
    1 2.5 GHz Intel Core 2 Duo CPU: 2-core
    2 GB RAM Upgradeable
        BANK 0/DIMM0
            1 GB DDR2 SDRAM 667 MHz ok
        BANK 1/DIMM1
            1 GB DDR2 SDRAM 667 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 22
Video Information: ℹ️
    GeForce 8600M GT     - VRAM: 512 MB
        Color LCD 1680 x 1050
System Software: ℹ️
    OS X 10.10.3 (14D131) - Time since boot: 20:9:2
Disk Information: ℹ️
    Hitachi HTS542525K9SA00 disk0 : (250.06 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 249.20 GB (27.51 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ℹ️
    Apple Inc. Built-in iSight
    Apple, Inc. Apple Internal Keyboard / Trackpad
    Apple Computer, Inc. IR Receiver
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
Gatekeeper: ℹ️
    Mac App Store and identified developers
Adware: ℹ️
    Geneio [Adware! - Remove]
Kernel Extensions: ℹ️
        /Library/Application Support/Symantec/AntiVirus
    [not loaded]    com.symantec.kext.SymAPComm (11.1.2f17) [Click for support]
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    [not loaded]    com.sierrawireless.driver.SierraHSRSupport (3.0.0) [Click for support]
    [not loaded]    com.sierrawireless.driver.SierraIPDirect (1.1.5) [Click for support]
    [not loaded]    com.symantec.kext.internetSecurity (1.3.2f5) [Click for support]
    [not loaded]    com.symantec.kext.ips (3.2f8) [Click for support]
    [not loaded]    com.zte.LTEdriver.cdc_ecm_qmi (1.0.2) [Click for support]
    [not loaded]    com.zte.LTEdriver.cdc_usb_bus (1.0.2) [Click for support]
Problem System Launch Agents: ℹ️
    [killed]    com.apple.CallHistoryPluginHelper.plist
    [killed]    com.apple.CallHistorySyncHelper.plist
    [killed]    com.apple.cloudphotosd.plist
    [killed]    com.apple.coreservices.appleid.authentication.plist
    [killed]    com.apple.EscrowSecurityAlert.plist
    [killed]    com.apple.icloud.fmfd.plist
    [killed]    com.apple.Maps.pushdaemon.plist
    [killed]    com.apple.SafariNotificationAgent.plist
    [killed]    com.apple.sbd.plist
    [killed]    com.apple.security.cloudkeychainproxy.plist
    [killed]    com.apple.telephonyutilities.callservicesd.plist
    11 processes killed due to memory pressure
Problem System Launch Daemons: ℹ️
    [killed]    com.apple.awdd.plist
    [killed]    com.apple.ctkd.plist
    [killed]    com.apple.findmymac.plist
    [killed]    com.apple.ifdreader.plist
    [failed]    com.apple.mtrecorder.plist
    [killed]    com.apple.nehelper.plist
    [killed]    com.apple.wdhelper.plist
    [killed]    com.apple.xpc.smd.plist
    7 processes killed due to memory pressure
Launch Agents: ℹ️
    [loaded]    com.divx.dms.agent.plist [Click for support]
    [loaded]    com.divx.update.agent.plist [Click for support]
    [running]    com.sierrawireless.SwitchTool.plist [Click for support]
    [running]    com.symantec.uiagent.application.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [failed]    com.apple.spirecorder.plist
    [running]    com.eltima.ElmediaPlayer.daemon.plist [Click for support]
    [loaded]    com.ManyCamLLC.videodevice.daemon.plist [Click for support]
    [loaded]    com.symantec.avscandaemon.plist [Click for support]
    [running]    com.symantec.diskMountNotify.plist [Click for support]
    [loaded]    com.symantec.MissedTasks.plist [Click for support]
    [loaded]    com.symantec.navapd.plist [Click for support]
    [loaded]    com.symantec.navapdaemonsl.plist [Click for support]
    [loaded]    com.symantec.Sched501-1.plist [Click for support]
    [running]    com.symantec.sharedsettings.plist [Click for support]
    [running]    com.symantec.symdaemon.plist [Click for support]
    [running]    com.symantec.symSchedDaemon.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.nchsoftware.expresszip.schedule.LikeSurvey.plist [Click for support]
User Login Items: ℹ️
    AirPort Base Station Agent    Application Hidden (/System/Library/CoreServices/AirPort Base Station Agent.app)
    iTunesHelper    UNKNOWN Hidden (missing value)
    Skype    Application (/Applications/Skype.app)
    Firefox    Application Hidden (/Applications/Firefox.app)
    TextEdit    Application Hidden (/Applications/TextEdit.app)
    Safari    Application (/Applications/Safari.app)
    Mobile Broadband Manager    Application (/Applications/Mobile Broadband Manager.app)
    Dropbox    UNKNOWN (missing value)
    Genieo    Application (/Incompatible Software/Genieo.app)
    StatusMenu    Application (/Incompatible Software/StatusMenu.app)
    SymSecondaryLaunch    Application (/Library/Application Support/Norton Solutions Support/Scheduler/SymSecondaryLaunch.app)
Internet Plug-ins: ℹ️
    Flip4Mac WMV Plugin: Version: 2.3.8.1 [Click for support]
    FlashPlayer-10.6: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    OVSHelper: Version: 1.1 [Click for support]
    DivX Web Player: Version: 3.2.4.1250 - SDK 10.6 [Click for support]
    Flash Player: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    QuickTime Plugin: Version: 7.7.3
    Silverlight: Version: 5.1.10411.0 - SDK 10.6 [Click for support]
    iPhotoPhotocast: Version: 7.0
Safari Extensions: ℹ️
    Searchme [Adware! - Remove]
    Slick Savings [Adware! - Remove]
    Amazon Shopping Assistant [Adware! - Remove]
    Ebay Shopping Assistant [Adware! - Remove]
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Flip4Mac WMV [Click for support]
    Norton\nQuickMenu [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 249.20 GB Disk used: 221.69 GB
    Destinations:
        Time Machine Backups [Local]
        Total size: 0 B
        Total number of backups: 0
        Oldest backup: -
        Last backup: -
        Size of backup disk: Too small
            Backup size 0 B < (Disk used 221.69 GB X 3)
Top Processes by CPU: ℹ️
         8%    WindowServer
         0%    AppleSpell
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Top Processes by Memory: ℹ️
    110 MB    Safari
    99 MB    mds_stores
    71 MB    softwareupdated
    69 MB    WindowServer
    47 MB    Mail
Virtual Memory Information: ℹ️
    51 MB    Free RAM
    737 MB    Active RAM
    701 MB    Inactive RAM
    399 MB    Wired RAM
    8.97 GB    Page-ins
    443 MB    Page-outs
Diagnostics Information: ℹ️
    Apr 13, 2015, 04:57:56 PM    /Library/Logs/DiagnosticReports/com.apple.WebKit.Plugin.64_2015-04-13-165756_[r edacted].cpu_resource.diag [Click for details]
    Apr 12, 2015, 09:44:34 PM    Self test - passed

Can I partition a soon to be received iMac 27" 3.4 Ghz i7 Quad core running Lion and install Snow Leopard to run old applications

I am about to get a 27" iMac 3.4 Ghz i7 Quad Core with Lion installed.
I want to run one or two old applications that will not run under Lion.
Is it possible to partition the iMac to run Snow Lepoard from there when I need it ?

I have tried to partition my Macbook Air (running Lion) using Bootcamp but all it will let me do is install Windows (which I do nor want to do.) Otherwise it will not partition the HD.
It gives three options. 1. Create a Windows 7 install disc. 2. Download the Windows support software. 3. Install Windows 7.
For interest I ran Bootcamp on my iMac (running Snow Leopard) and that would allow me just to partition the drive
(with no need to install Windows) by checking "I have the Mac OS X installation diec... or I have the support software.." (which I don't) and then goes to the partitioning page.
If you can put me wise I wouldbe grateful.
Cheers
Roger.

How to uninstall Lion and restore Snow Leopard?

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