Can I uninstall Yosemite and go back to my old OS?

Can I uninstall Yosemite and go back to my old OS?

It's not a simple uninstall. You'll need to erase the hard drive, install the old OS version, and then restore your data from a backup. It's a time consuming process and it's probably easier to try and troubleshoot whatever issues you're having with Yosemite.

Similar Messages

  • I hate Firefox 4! My favorite add on doesn't work, it is slow and locks up. I run Windows 7. Can I uninstall 4 and go back to the old version? If so, how?

    As a former programmer, I am dismayed that such a poor version would be released! It reminds me of dealing with Windows 98!

    I don't understand WHY they would pull support for the older version v3.6.16 when it is obvious that so many people want to go back to that version. The new version is TERRIBLE!! I am having problems with it and reading thru these posts so are a lot of people.
    I urge you NOT to pull support until you come up with a better version than this one. I plan to go back to the older version and if you pull support I will go back to internet explorer before I go to this new version of firefox. I have used firefox for years and recommended it to a lot of people but I am very disappointed in this version.

  • How can I uninstall yosemite and reinstall Loin with out losing all my in formation and programs

    How can I uninstall Yosemite and reinstall Loin with out losing all my in formation and programsThis had been the worst os system apple has come out, too many errors
    too many to list.
    a few
    Losing all mail. and watching them disappear in front of my eyes and could nothing about it
    also when accessing cloud the screen just rolls in when accessing mail, like loading and loading and loading for 1 to 2 minuets.
    I did not up grade my Mac Book Pro, and is working fine,
    Just my iMac, its act kile avid card and it only happens access iCloud mail.
    so I want to and need to go back to Loin

    You can't unless you have a current backup of your old Lion system because the first thing you must do is erase the drive. It 's possible to use Target Disk Mode between your iMac and the MBP in order to clone the MBP to the iMac. However, that will still erase everything on the iMac's drive.
    Or you could see about getting Yosemite to work correctly. If you have IMAP mail, then your mail should be intact.
    Try these in order testing your system after each to see if it's back to normal:
    1. a. Resetting your Mac's PRAM and NVRAM
        b. Intel-based Macs: Resetting the System Management Controller (SMC)
    2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
    Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the Utilities menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
    3. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities menu. Repair the Hard Drive and Permissions as follows.
    When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu. Select Restart from the Apple menu.
    4. Reinstall Yosemite: Reboot from the Recovery HD. Select Reinstall OS X from the Utilities menu, and click on the Continue button.
    Download and install the 10.10.1 update.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible
                because it is three times faster than wireless.
    5. Reinstall Yosemite from Scratch:
    Download and install the 10.10.1 update.
    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
    How to Clean Install OS X Yosemite
    Note: You will need an active Internet connection. I suggest using Ethernet if possible
                because it is three times faster than wireless.

  • Can I uninstall Yosemite and reload my older operating system

    can I uninstall Yosemite and reload my older operating system

    I tried this method and erased my MC HD and restored my system, but the bad thing is once you install YOSEMITE it overrides your Recovery with yosemite and you lose Maverick. I called Apple support regarding this same issue. I have to take my Mac to apple to have it replaced with a new one that has maverick installed on it.
    Yosemite is causing display glitches, wifi slow downs, dock disappears from one screen to the other or completely and cannot get it back.

  • HT201364 I recently installed Yosemite from Mavericks.  I find that Yosemite is slowing me down and causing havoc on my home web page.  How do uninstall Yosemite and get back to Mavericks?

    I recently installed Yosemite from Mavericks.  I find that Yosemite is slowing me down and causing havoc on my home web page.  How do uninstall Yosemite and get back to Mavericks?

    kenmac1969 wrote:
    I'm gonna jump in as I have similar issues with Yosemite.
    My two old white MacBooks run perfect with Snow leopard, but my 2011 17" i7 Macbook Pro is a dead slug with yosimite installed.
    Tried the start with C held down, also with option held down.  All it does is beeps at me three times, then again three times..... 
    I want to remove yosimite and install Snow leopard from dvd as yosimite runs worse than a Windows OS.
    Can it be done, what do I need to do please?
    Examples of faults,  even with a 1tb solid state drive and 16 gig of ram, it is incredibly slow.  Took four hours to install Logic 8 last night, I still have to reinstall logic 9 upgrade.   On the White MacBooks I got both 8 and 9 installed in under an hour and a half all up.
    Beeping on startup means failed RAM.
    Slowness is usually caused by incompatible third-party system modifications.

  • I have quicktime pro and it does NOT have the screen record mode that Quicktime is suppose to have.  Can I uninstall it and go back to an older version that would have screen recording?  If so, how?  Step by step needed.  Thank you for your time.

    I have quicktime pro and it does NOT have the screen record mode that Quicktime is suppose to have.  Can I uninstall it and go back to an older version that would have screen recording?  If so, how?  Step by step needed.  Thank you for your time.

    Did you remove Quicktime X?
    On a normal install Quicktime 7 is installed in the Utilities folder and Quicktime Pro in the main Applications folder.
    You will need to reinstall OS X to get Quicktime X back if you have deleted it.
    I notice yor profile says 10.5.8. Quicktime X is only available on 10.6 and above.

  • How can I uninstall FF4 and go back to FF3.x?

    ''Duplicate post, continue here - [https://support.mozilla.com/en-US/questions/814655]''
    I have nothing but constant issues with video not running, my Google Analytics page freezing up, Facebook lagging, and other weird and annoying garbage with Firefox 4 that I never had with previous versions. Not to mention that it seems to use 3 times as much memory as the older versions. I just want to uninstall it and go back to 3. And if I can't do this I'm going to Chrome.

    To downgrade to Firefox 3.6 first uninstall Firefox 4, but do not select the option to "Remove my Firefox personal data". If you select that option it will delete your bookmarks, passwords and other user data.
    You can then install the latest version of Firefox 3.6 available from http://www.mozilla.com/en-US/firefox/all-older.html - it will automatically use your current bookmarks, passwords etc.
    To avoid possible problems with downgrading, I recommend going to your profile folder and deleting the following files if they exist - extensions.cache, extensions.rdf, extensions.ini, extensions.sqlite and localstore.rdf. Deleting these files will force Firefox to rebuild the list of installed extensions, checking their compatibility, and reset toolbar customizations.
    For details of how to find your profile folder see https://support.mozilla.com/kb/Profiles

  • 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.
    Click the [Adware! - Remove] links for help removing adware.
    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]
            /System/Library/Extensions
        [not loaded]    com.ZTE.driver.ZTELTEUSBCDCACMData (5.0.1) [Click for support]
        [not loaded]    com.ZTE.driver.ZTELTEUSBMassStorageFilter (5.0.1) [Click for support]
        [not loaded]    com.ZTE.driver.ZTEUSBCDCACMData (1.3.12) [Click for support]
        [not loaded]    com.ZTE.driver.ZTEUSBMassStorageFilter (1.3.12) [Click for support]
        [loaded]    com.eltima.ElmediaPlayer.kext (1.0) [Click for support]
        [not loaded]    com.sierrawireless.driver.SierraDIPSupport (1.0.0) [Click for support]
        [not loaded]    com.sierrawireless.driver.SierraFSRSupport (3.0.0) [Click for support]
        [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
             0%    taskgated
             0%    fontd
             0%    SpotlightNetHelper
    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

  • I have installed firefox Aurora, but can I uninstall it and go back to Firefox 11 if I find version 11 better? Will I lose history and bookmarks?

    I have installed the new version 13, called Aurora. I am currently using it, but if I start not liking the new features (so far I do! But I have to ask) can I "go back" to the "good old" Firefox 11?
    Will I be loosing my data and settings? History and bookmarks?
    My computer is a Pentium M 1,6GHz (2004.) and the version 11 seemed very stable. The reason I installed Aurora is because I wanted to try your new software.

    Also, before you go back to an older version (transition from Aurora to Release), you might want to back up your bookmarks and such. Usually, an older version of Firefox will be able to read your data, but this is not guaranteed.

  • My online classroom does not support 4.0 - how can I uninstall it and go back to 3.5?

    When I try to log in to my online class, I get an error message that I am using an unsupported browser.

    http://support.mozilla.com/en-US/kb/Installing+a+previous+version+of+Firefox

  • Every time I update Firefox I can't get back on the internet. I have to uninstall and go back to an old Firefox.

    I have an old Firefox. Every time I update to a new version, I can't get back on the internet. It tells me it can't find the server. So I have to uninstall the updated version and go back to my old version.

    Check your firewall settings.
    http://kb.mozillazine.org/Firewalls

  • Can I uninstall Yosemite from my iMac and reinstall Mountain Lion?

    Can I uninstall Yosemite from my iMac and reinstall Mountain Lion?

    For instructions see http://support.apple.com/kb/PH18846

  • How can I uninstall Bootcamp and Recover the partition for the Mac HD

    How can I uninstall Bootcamp and recover the partition for the IMac HD?

    Boot into OSX.  Go back into the Bootcamp utility in the Utilities folder and re-run it.  It will give you the option to remove the Windows partition and make the OSX partition fill the whole drive again.  OSX will NOT be lost in the process.  No re-installing necessary.  Only takes a few minutes or less to complete.

  • 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

  • Remove latest macbook update "yosemite" and return back to "maverick"

    Hi,
    I have just updated my macbook pro to the new software "Yosemite", now my drawing program, AutoCAD does not open...
    I really need this program for work... Is there anyway i can remove this update and return back to my original system, (maverick) i think it was...
    Thankyou in advance
    Greg

    If you have a complete backup or clone of your Mac before you installed Yosemite, you can erase the Mac and restore the backup.

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