Going from Snow Leopard to Leopard...Possible?

I'd like to install OS 10.5.8 in place of Snow Leopard(has been too glitchy for me) but hear that it's not possible to use a lower OS than one's Mac originally came with.
Is that true?

See Computer-specific Mac OS X releases and Don't install a version of Mac OS X earlier than what came with your Mac for details.

Similar Messages

  • Going from Snow Leopard to Tiger

    I'm expecting delivery of a 21.5 in iMac today, and will be using it in a network with three G5 iMacs running OS 10.4.11. I've already attempted working on this network with my 2-week old MacBook Pro running 10.6.3 and encountered problems that make our workflow very difficult.
    What steps do I need to take with the new iMac to clear it of 10.6.3 and install 10.4.11 so we can stay in business?

    Hi MLynch23;
    Apple recommends that an older version of the operating system the hardware shipped with not be installed. Generally older version will not support new hardware. If it does install, you will generally have problems. Also if you have problem the older version of the operating system is an unsupported configuration.
    My suggestion to you is to figure out what is wrong with your network since Macs running Tiger and Snow Leopard should be able to co-exist on the same network.
    Allan

  • Going from snow leopard 10.6.8 to mtn lion

    How is the transition going from os 10.6.8 to Mountain Lion.  My system runs awesome and I am so hesitant to upgrade for some software I need. 

    Before attempting any Major Upgrade... get yourself an External Hard Drive... and create a Bootable Clone Backup of your current Hard Drive...
    By far the easiest way to make such a Backup, is to use something like
    SuperDuper  http://www.shirt-pocket.com/
    or CCC  http://www.bombich.com/
    That way, should anything untoward happen during the Upgrade,
    you will NOT LOSE ANYTHING.
    (Get an EHD that is at least equal to your current Drive...)
    With Regard to ML...  Check here for compatibility of 3rd party Software you may be using... Also note that Rosetta is no longer supported in Lion and Mountain Lion...
    http://roaringapps.com/apps:table
    You should also consider more RAM...
    It is important to get the Correct and Matching RAM
    See Here  >  OWC RAM  >  http://www.macsales.com
    The above site also has videos on how to Install RAM should you need it...

  • Mail etc migration from Snow Leopard

    Hi Folks.
    My new iMac has just arrived. Previously I have moved everything from my old imac to a new one as a single operation. But this has left me with a lot of Power Mac software and loads of other stuff that is now irrelevant. So this time I'm going to set it up from scratch.
    My question therefore is, going from Snow Leopard to Mountain Lion, what files (and/or) folders to I need to drag across and replace, in order to bring across all of my emails, contacts and calendar events etc onto the new iMac?
    Assuming it is that simple....
    Many thanks,
    David.

    A Basic Guide for Migrating to Intel-Macs
    The Knowledgebase article Intel-based Mac: Some migrated applications may need to be updated refers to methods of dealing with migrating from PowerPC chips to Intel with the Migration Assistant safely. The authors of this tip have not had a chance to verify this works in all instances, or that it avoids the 10.6.1 and earlier Guest Account bug that caused account information to get deleted upon use of the Migration/Setup Assistant. However, a well backed up source that includes at least two backups of all the data that are not connected to your machine will help you avoid potential issues, should they arise. In event it does not work, follow the steps below.
    If you are migrating a PowerPC system (G3, G4, or G5) to an Intel-Mac be careful what you migrate.  Keep in mind that some items that may get transferred will not work on Intel machines and may end up causing your computer's operating system to malfunction.
    Rosetta supports "software that runs on the PowerPC G3, G4, or G5 processor that are built for Mac OS X". This excludes the items that are not universal binaries or simply will not work in Rosetta:
      1. Classic Environment, and subsequently any Mac OS 9 or earlier applications
      2. Screensavers written for the PowerPC System Preference add-ons
      3. All Unsanity Haxies Browser and other plug-ins
      4. Contextual Menu Items
      5. Applications which specifically require the PowerPC G5 Kernel extensions
      6. Java applications with JNI (PowerPC) libraries
    See also What Can Be Translated by Rosetta.
    In addition to the above you could also have problems with migrated cache files and/or cache files containing code that is incompatible.
    If you migrate a user folder that contains any of these items, you may find that your Intel-Mac is malfunctioning. It would be wise to take care when migrating your systems from a PowerPC platform to an Intel-Mac platform to assure that you do not migrate these incompatible items.
    If you have problems with applications not working, then completely uninstall said application and reinstall it from scratch. Take great care with Java applications and Java-based Peer-to-Peer applications. Many Java apps will not work on Intel-Macs as they are currently compiled. As of this time Limewire, Cabos, and Acquisition are available as universal binaries. Do not install browser plug-ins such as Flash or Shockwave from downloaded installers unless they are universal binaries. The version of OS X installed on your Intel-Mac comes with special compatible versions of Flash and Shockwave plug-ins for use with your browser.
    The same problem will exist for any hardware drivers such as mouse software unless the drivers have been compiled as universal binaries. For third-party mice the current choices are USB Overdrive or SteerMouse. Contact the developer or manufacturer of your third-party mouse software to find out when a universal binary version will be available.
    Also be careful with some backup utilities and third-party disk repair utilities. Disk Warrior, TechTool Pro , SuperDuper , and Drive Genius  work properly on Intel-Macs with Leopard.  The same caution may apply to the many "maintenance" utilities that have not yet been converted to universal binaries.  Leopard Cache Cleaner, Onyx, TinkerTool System, and Cocktail are now compatible with Leopard.
    Before migrating or installing software on your Intel-Mac check MacFixit's Rosetta Compatibility Index.
    Additional links that will be helpful to new Intel-Mac users:
      1. Intel In Macs
      2. Apple Guide to Universal Applications
      3. MacInTouch List of Compatible Universal Binaries
      4. MacInTouch List of Rosetta Compatible Applications
      5. MacUpdate List of Intel-Compatible Software
      6. Transferring data with Setup Assistant - Migration Assistant FAQ
      7. OS X Lion: How to use Migration Assistant to transfer files from another Mac
    Because Migration Assistant isn't the ideal way to migrate from PowerPC to Intel Macs, using Target Disk Mode, copying the critical contents to CD and DVD, an external hard drive, or networking will work better when moving from PowerPC to Intel Macs.  The initial section below discusses Target Disk Mode.  It is then followed by a section which discusses networking with Macs that lack Firewire.
    If both computers support the use of Firewire then you can use the following instructions:
      1. Repair the hard drive and permissions using Disk Utility.
      2. Backup your data.  This is vitally important in case you make a mistake
          or there's some other problem.
      3. Connect a Firewire cable between your old Mac and your new Intel Mac.
      4. Startup your old Mac in Transferring files between two computers using FireWire.
      5. Startup your new Mac for the first time, go through the setup and
           registration screens, but do NOT migrate data over. Get to your
           desktop on the new Mac without migrating any new data over.
    If you are not able to use a Firewire connection (for example you have a Late 2008 MacBook that only supports USB:)
    1. Set up a local home network: Creating a small Ethernet Network.
    2. If you have a MacBook Air or Late 2008 MacBook see the following:
      a. MacBook (13-inch, Aluminum, Late 2008) and MacBook Pro (15-inch,
          Late 2008) - What to do if migration is unsuccessful;
      b. MacBook Air - Migration Tips and Tricks;
      c. MacBook Air - Remote Disc, Migration, or Remote Install Mac OS X and
          wireless 802.11n networks.
    Copy the following items from your old Mac to the new Mac:
    In your /Home/ folder: Documents, Movies, Music, Pictures, and Sites folders.
    In your /Home/Library/ folder:
    /Home/Library/Application Support/AddressBook (copy the whole folder) /Home/Library/Application Support/iCal (copy the whole folder)
    Also in /Home/Library/Application Support (copy whatever else you need including folders for any third-party applications)
    /Home/Library/Keychains (copy the whole folder) /Home/Library/Mail (copy the whole folder) /Home/Library/Preferences/ (copy the whole folder) /Home /Library/Calendars (copy the whole folder) /Home /Library/iTunes (copy the whole folder) /Home /Library/Safari (copy the whole folder)
    If you want cookies:
    /Home/Library/Cookies/Cookies.plist /Home/Library/Application Support/WebFoundation/HTTPCookies.plist
    For Entourage users:
    Entourage is in /Home/Documents/Microsoft User Data Also in /Home/Library/Preferences/Microsoft.
    Credit goes to Macjack for this information.
    If you need to transfer data for other applications please ask the vendor or ask in the  Discussions where specific applications store their data.
    5. Once you have transferred what you need restart the new Mac and test to make sure the contents are there for each of the applications.
    Written by Kappy with additional contributions from a brody.Revised 5/21/2011

  • Updated from Snow Leopard to Mountain Lion and every time the MB goes to sleep I have to change my location to restore the internet connection. Any ideas why?

    I have just updated to ML from Snow Leopard (to be able to use iCloud with my new iPhone 5) and after every time my 2009 MB 13" goes to sleep I have to change location in order to be able to navigate the internet. The connection is made but does not work on navigation. Changing locations enables navigation of the internet. I have three locations 'Automatic', 'Home' and 'Neufbox', my one-month-old ISP-supplied 'box' (router + VOIP telephone). I have never had such problems so I don't remember which location was the default although I am inclined to think it was 'Home'. The MB was delivered on Leopard and I updated to Snow Leopard with no problem. I didn't go to Lion. A friend recommended that I do this latest update because I couldn't synchronise the contacts and calendar from the MB to the iPhone and I hesitated after reading the many reports of inherent problems. I now have great regrets.

    No, it doesn't store a clone. You would have needed to make one with either SuperDuper or CarbonCopy Cloner.
    If the files were in your ~/Library folder then they may still be there. As I said, you can access it by
    going to your Finder "Go" menu hold the option key to choose "Library". I wouldn't think an upgrade would overwrite anything in ~/Library.
    If you have a Time Machine backup you may also be able to use that to retrieve them.

  • I recently upgraded to Mavericks from Snow Leopard. Does Snow Leopard still exist on my Mac? If so, is it possible to restart under Snow Leopard in order to run PowerPC apps? If not, is there an OS available in 64 bit that supports PowerPC apps? Mav ***.

    I recently upgraded to Mavericks from Snow Leopard. Does Snow Leopard still exist on my Mac? If so, is it possible to restart under Snow Leopard in order to run PowerPC apps? If not, is there an OS available in 64 bit that supports PowerPC apps? Mav ***.

    The only reason I upgraded to Mavericks was because my Snow Leopard OS was 32 bit, which I was told would support only 4GB of RAM.
    That wasn't quite right. You can put in as much RAM as your Mac's hardware supports. The division is in the apps themselves. A 32 bit app can't use more than 4 GB or RAM. A 64 bit app can use much more.
    For example, as a 32 bit only version, Photoshop CS3 can't use more 4GB of RAM, no matter how much you actually have installed. CS4 or later can use all the RAM you want to throw at it.

  • Is it possible to migrate from snow leopard to lion?

    My son just received his new Macbook Pro (15 "); he is running Snow Leopard on his 2008 model Macbook Pro.  Is it possible to migrate from Snow Leopard to Lion using the setup assistant or does he have to upgrade to Lion first?

    John Boley wrote:
    CS  and others in his college work and I have read elsewhere it is best to reinstall those programs. 
    True. 10.7 is a different animal and most all software has to be installed from fresh sources preferred. (cleans things up too)
    There is CS6 now for 10.7, just released.
    Check for comptability here, then make the decision if it's worth migrating the programs or not.
    http://roaringapps.com/apps:table
    Will the setup assistant "automatically" try to transfer everything?
    I don't know, I never used it.
    Too hard core old school to use Apple's gimmicky and problematic software.
    I rather clean install a new machine, only manually transfering files from the old one, cleaner setup that way and no hidden surprises or performance issues.

  • Going back to leopard from snow leopard Can I restore from Time machine

    My Imac continues to lock up about three times a day since I went to Snow Leopard.
    I want to go back to Leopard where I did not have these problems.
    Can I reformat and do a clean install and then restore everything from time machine even though the back up is from Snow Leopard?

    You can restore the system to any previous dated state shown in your Time Machine backups. However, this will not preserve anything you created after that date. You can also restore individual files & folders from later backups but you may or may not be able to use files you created using Snow Leopard while running Leopard, depending on the parent application & if it was updated to use a new file format with Snow Leopard.
    It is generally much better to resolve the issues you have with Snow Leopard & continue using it than to try to do this. Most issues are fairly easy to resolve. If you want help with that, let us know.

  • No possibility to upgrade from Snow Leopard to Lion (MacBook Late 2006)

    Today I wanted to upgrade my MacBook (Late 2006) from Snow Leopard to Lion, as Lion is the last OS X that my old MacBook will run.
    But, in the Mac App Store, Lion isn't anymore available for purchase and download.
    What can I do?
    For me, it's unbelievable that I cannot upgrade anymore!
    Maybe it's better to install Windows7 and forget Apple.

    @ Courcoul
    You can still buy a Snow Leopard DVD, but you cannot download Lion anymore. That's the craziness of Apple's MacAppStore! No old versions...
    It seems that Apple only wants us to buy new hardware that fits the stuff offered in their MacAppStore.

  • After upgrade my MBP from snow leopard to mountain lion all my smb connections stop to work.

    After upgrade my MBP from snow leopard to mountain lion all my smb connections stop to work.
    Now iám using mac os 10.8.2
    I can see the server, I can choose the drive, but when try to open a folder the message on Finder is: You don't have permissions to see the content.
    I already delete the key and try to connect again, but the problem persist. Already try change the ip from file server. Already try differents users. (admin, guest, etc...)
    I have a windows server 2008 and a NAS working with SMB protocol. Both with the same problem.
    That problem occurs only on Finder, if I try see the folder by Terminal, is possible to see my files.
    Any Solution ?
    Any Tip ?
    Any Question ?

    Not knowing how much RAM is installed in your iMac, your iMac can take a total of 8 GBs of RAM.
    Before upgrading to Mountain Lion, I would strongly suggest installing the maximum 8 GBs of RAM.
    Correct and reliable Mac RAM can be purchased from online Mac RAM sources Crucial memory or OWC (macsales.com).
    Here is OWC's link to your model iMac and the RAM modules you will need.macsales
    http://eshop.macsales.com/item/Other%20World%20Computing/8566DDR3S8GP/
    You can purchase and download OS X 10.8 Mountain Lion from the Mac App Store in the OS X dock.
    Before installing, it would be prudent to make a backup copy of all of your important data or your entire current system. Either using, optical discs, USB flash drives or external hard drives.
    This is too insure protection of your data in case something goes wrong with the install of OS X Mountain Lion.
    Good Luck!

  • Upgrading from Snow Leopard (10.6.8) to Mountain Lion

    So I purchased Mountain Lion online and received the redeem code from Apple. I've redeemed the download for Mountain Lion but have been having issues trying to even initiate the download. I've gone into system preferences and turned off the computer's sleep mode to prevent the computer from going to sleep during the download. When I click download, the App Store seems to load for a second and then it just goes back to saying download (as if I never pressed the button, or at least that's what it looks like). I have gotten it to start downloading once (as indicated by the icon that appeared in my dock), but about mid-way through it failed and said I had to retry.
    I'm upgrading from Snow Leopard (v10.6.8) so I don't have launchpad. I'm also limited in my ability to get fast internet (I have to go to a coffee shop to get decent internet where I live). So I guess a couple questions:
    1. Is there a minimum internet speed requirement for downloading Mountain Lion? (If not, I'm willing to wait at the coffee shop even if it takes a while)
    2. If it isn't necessarily an internet speed issue, could it possibly be downloading somewhere where I can't see it download? (although I this seems unlikely as I have had the download appear in my dock on at least one occassion)
    3. Is there anything else on my end that might be causing issues with the download that anyone can think of? (I've called apple a couple of times already so I just wanna make sure there isn't anything glaring that I might be missing before I try to call them again)
    If there is any other info that might help diagnose the situation, let me know and I'll try to describe what's happening on my end
    Thanks!

    Yeah, that's pretty much what I have (1.5 MBps down and up). The connection isn't consistent though (it drops and reconnects on an inconsistent basis). I guess the problem I'm having is getting the download to even initiate, which has, to my knowledge, only happened once (this morning). I go back to school on Wednesday where I have a 10 MBps down and up connection. Trying to get this done as soon as possible with school starting up again next week to try and make sure everything is up and running smoothly.

  • Mavericks upgrade from Snow Leopard broke boot camp. Help!

    Since Apple made the newest version of OS X free, I decided to upgrade my 2010 MacBookPro from Snow Leopard. The installation seemed to go fine, but after the installation, I can't boot into my Bootcamp / Windows partition. From what I have read so far, others have experienced this issue upgrading from Snow Leopard to Mountain Lion because the recovery partition apparently messes up something fragile between the MBR (Master Boot Record) and the GPT (GUID Partition Table). I'm not sure if that's what's going wrong here or not.
    When I attempt to repair /dev/disk0s4 via the GUI Disk Utility, I get the following details:
    Verify and Repair volume “disk0s4”
    Checking file system** /dev/disk0s4
    Invalid BS_jmpBoot in boot block: 6e0020
    Volume repair complete.Updating boot support partitions for the volume as required.
    Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
    Here's a screen shot:
    http://imgur.com/6XLYMOM
    Well, I can't mount the partition to copy off my files, and I just want to be able to go back to using my windows partition normally. So I started Googling and found several different threads, but so far I'm a few hours into trying to get my system back, without a clue as to what the right fix is.
    Upgrading the OS on one partition of a HDD shouldn't completely break another partition. Is my case just a freak accident, or is this a serious flaw in the upgrade process? Sifting through 250GB of data (1/2 my laptop drive) is going to take some of these tools a while... I'm not a happy customer today.
    Aside from spending upwards of 12 hours reinstalling Windows and the dozens of other applications and data files from backups and recovering all the files that I can, does anyone know of any tools that can recover the lost partition should I find it? I'm going to leave testdisk running over the disk while I sleep to try and find filesystems.

    I had Windows 7 64-bit installed, but the version is irrelevant. The problem here is that *something* Apple's installer did damaged my working computer. The fact that it damaged others as well and apparently hasn't been fixed since the release of Mountain Lion is very disappointing. Boot camp is a supported Apple product, and we pay a premium for Apple's computers so we should expect better than for an upgrade to blithely destroy our data and tools leaving us to spend days restoring. That's no upgrade. It's a minefield. I'm happy if some good comes from my sharing and it helps others make better decisions than to trust the installer not to screw up their week. Make sure you back up your whole disk image before installing. The upgrade is only free if your time is worthless.
    I'm still looking for an easy fix to this problem. The disk scanning software I'm running now is taking a long time to search through the 500GB HDD for information. I fear that the addition of the recovery partition wiped out my NTFS partition's file system entirely. It's inevitable that I haven't backed up all my stuff and that I have lost some amount of data in addition to my time.

  • Complications migrating from Snow Leopard Server to Mountain Lion Server.

    I'm migrating from Snow Leopard Server to Mountain Lion Server. The article "OS X Server: Upgrade and migration" (http://support.apple.com/kb/HT5381) says
    "Make sure that any DNS or DHCP servers on which your server depends remain running during the upgrade"
    This advice is reinforced by the details of the article "OS X Server: Steps to take before upgrading or migrating the Open Directory database" (http://support.apple.com/kb/HT5300).
    As the server I'm migrating from provides these services it will need to be running during the migration process. This would seem to limit my options to doing the migration from a Time Machine backup (or, making a seperate clone of the server's drive and connecting it externally to the new box)
    My main concern is the seemingly inevitable clash that is going to occur on the network as the new server takes on the roles of the old one - while it is still running.
    What are my options here ?
    This is my second attempt as on my first try I did the migration from the TM backup with the network down - and none of my local network users or their home directories were migrated, although the settings for the mount points were, but there were no actual directories where they pointed to!
    Clear directions on how to procede would be VERY MUCH appreciated
    Thank you.

    Moving from Snow Leopard to Mountain Lion means first installing the client (non-Server) version of Mountain Lion and then install Server.app this means that for at least part of the process you will not be running DNS, DHCP or Open Directory.
    If you are going to end up using the same DNS name and IP address after the change then an approach you could follow would be as follows.
    Destroy any Open Directory replicas
    Archive your Open Directory Master (to make a backup)
    Note down your DNS records in case they get messed up
    Export via Workgroup Manager your users, and groups (you might not need this but better safe than sorry), make sure you do not include the diradmin account
    Keep a full back of the server (you should always have backups)
    Note down your DHCP server settings in case they get messed up
    Note down any other service settings
    Install Mountain Lion
    Install Server.app
    Install Workgroup Manager (extra free download)
    Run Server.app
    Make sure settings for services are as much as possible the same as before
    If your lucky that may be all you need to do, otherwise...
    Restore Open Directory archive, if your lucky that will be all you need to do, otherwise...
    Make new Open Directory Master
    Run Workgroup Manager
    Import users and groups you previously exported
    You will then have to set passwords for each user as these are not preserved via Workgroup Manager export
    When I did this, I was also being forced to change all my IP addresses so I had no choice but to use Workgroup Manager to export and import accounts.

  • I want to upgrade my Imac from Snow Leopard to Yosemite, but only have 1Gb RAM. Can I add RAM, then upgrade?

    I want to upgrade from Snow Leopard to Yosemite, but can't because I only have 1Gb Memory.  Can I add more memory, then do the upgrade? What should I buy?

    gwd440 wrote:
    Its older than I realised. Purchased in 2009, but is an early 2008 model.
    So I'm possibly aiming a bit high by going for Yosemite?  Would an earlier o/s be a more realistic option?
    On the RAM issue, I fully agree with what Etresoft has written. I have just visited various sites, including OWC, Mactracker and iFixit and your Mac seems to have the Penryn processor. It will address 6GB of RAM which is more than enough for your use.
    Where I differ from him, is Lion. The last big cat which I liked was probably Snow Leopard, and thereafter now Yosemite. There has been a lot of successes with your generation migrating to Yosemite, but with 6GB of RAM. Admittedly there were also problems for some, but I have observed even more successes even after initial problems. Mostly these problems were caused by adware or crapware installations. (Thank you Etresoft for a wonderful utility!)
    Your iMac also has a SATA interface for a 3GB SSD, which is good enough. We have a Mac here with the same interface, still with a normal conventional stock HD running Yosemite, but only 4GB of RAM and it is running fine.
    Of course the newer technology processors, faster RAM, PCI SSD, greater bandwidth on the newer Macs perform much better. But as I am on the older side, (ha ha), some of the 'vintage' Macs are still my favourites to use for certain tasks. Like using 9.09 for doing certain things and then converting the results afterwards for completion!
    But, once again, it is your decision and only you can decide as you yourself knows your own circumstances better. Weigh up the options, considering what Etresoft has pointed out vs what Yosemite offers ito continuous support, security and features. There are a lot of your type of iMacs out there, and some of the users spoke about feeling like having a new Mac. There were others, who were wailing though. You could of course, also follow the advice of a test installation on an external and testdrive it, or wait for the release of 10.10.2 which I read somewhere is eminently close?
    Have fun
    Leo

  • Can i update from Snow leopard to Yosemite and still use old programs?

    If I update from Snow leopard (10.6.8) to Yosemite will my old programs work? I'm referring to Freehand MX, Adobe Suite SC2, Microsoft office 2004. I cannot afford to replace ANY of them (I got a Mac when I was diagnosed with Dyslexia while at University so the University bought it all for me).
    I have an external harddrive and was routinely backing up my computer however earlier this year it stopped working saying that there asn't enough room ( i though Time Machine deleted old copies?).  I've not very tec savvy at all (and don't underatand how to wipe my external harddrive to start again nor how to set up or use time machine properly).
    Please can someone help, explaining in plain English (pretend I'm 90 lol)

    I have an external harddrive and was routinely backing up my computer however earlier this year it stopped working saying that there asn't enough room ( i though Time Machine deleted old copies?).  I've not very tec savvy at all (and don't underatand how to wipe my external harddrive to start again nor how to set up or use time machine properly).
    You are correct in saying Time Machine will delete old files off of the backend of the backup set. Why this is not happening with your Time machine drive I am not certain, but I have seen this error when, for whatever reason the boot drive was selected as the Time Machine drive
    Open System Preferences > Time Machine and be sure the correct drive is selected, If not then change the selection to the correct drive.
    STOP
    Otherwise, since you say you are not very tech savvy I am assuming you do not have any third party volume repair utilities and since we do not know why your drive is full rather than deleting files off of the back of the set you want to take extra precautions to be as sure as possible the Time Machine drive is healthy. So I am going to recommend an extra step in the process. I am also assuming your Time Machine drive is attached to your Mac with either a USB or Firewire interface — this will not work for network drives.
    Open Disk Utility — you will find it in /Applications/Utilities on your Mac hard drive
    Select the Time Machine volume and click on the Erase tab
    The format should be Mac OS Extended (Journaled)
    You can change the name of the drive if you want
    Click on the Security Options button and move the slider one notch to the right
    Click on the Erase button — this will erase the drive and write zeros to every sector on the drive which should remap any bad sectors to the spare sectors on the drive but it will take some time, so don't get anxious.
    Assuming there are no errors when Disk Utility completes close it
    Open System Preferences > Time Machine and reselect the Time Machine drive.
    You Mac will then start a new Time Machine backup set. This may take several hours depending on the speed of your Mac the speed of the connection to the Time Machine drive and the speed of the Time Machine drive itself.

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