Reformat and Restore iMac

I would like to reformat and restore my hard drive on my iMac and have good instructions for doing this.  My question is, if I use the Mac OS Install DVD will it format to Mountain Lion or an older OS?  Maybe this happens in the restore step, but I don't want to end up with an old OS.  Thank you!

Install or Reinstall Lion/Mountain Lion from Scratch
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.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the 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.
Erase the hard drive:
  1. Select Disk Utility from the main menu and click on the Continue button.
  2. After DU loads select your startup volume (usually Macintosh HD) from the
      left side list. Click on the Erase tab in the DU main window.
  3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
        the Security button and set the Zero Data option to one-pass. Click on
      the Erase button and wait until the process has completed.
  4. Quit DU and return to the main menu.
Reinstall Lion: Select Reinstall Lion/Mountain Lion and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
            because it is three times faster than wireless.

Similar Messages

  • Reformat and restore?

    I have a mid 2010 imac that I recently maxed out the RAM in.  It has been running lightning fast until yesterday. Lightroom will not download pictures and other applications are slowing down.  My internet connection doesn't work either (although my macbook connects just fine).  I ran disk repair and it said to run from startup disk.
    I ran from startup and it said the disk could not be repaired and to perform backup, reformat, and restore.  I'm a photographer and I back-up daily, so losing information is not a concern of mine.  I've just read where this doesn't always fix the problem or there is a better solution.  Any help is greatly appreciated.

    Hey G.
    This all sounds all too familiar.
    Ditto what Kappy said but I'm using TechToolPro, essentially they do the same thing.
    This sounds like a situation I had earlier this year where a drive failed on me totally
    and irreparably, TechTool never even saw it coming!
    First things first, backup and then reformat. Hopefully some kind of bad sector mapping-out
    is builtin but not guaranteed. I don't think DU will inform you if you've got bad sectors,
    you'll need professional tools like mentioned above. It's pointless using a disk that is
    going to fail again.
    You've got a few options...
    1) Use existing disk and hope that it's just a one-off event and forget about it.
    2) Borrow the original Pro Disk Utils disk from a friend to check your drive.
    2) Get worried and buy professional disk utilities to give you some options.
    3) If reformatting doesn't solve the problem buy a new drive and Pro Disk Tools anyway.
    Also you didn't mention if you've got any Anti Virus software? The first thing you
    should be thinking about even before backing-up. It would be pointless to backup
    infected files that could reinfect your machine in the future... I'm using Sophos.
    A.

  • Reformat and restore directed by disk utility

    I have mid 2011 Air.  Disk utility has told me to reformat and restore system to solve problem with SSD.  Won't reformating destroy the ability to restore ystem fron the SSD?  How should I do this?

    On systems delivered with Lion or later, you have the recovery partition, which is what you are booting from when you boot with the command and r keys held down. The recovery partition is a separate partition on the hard drive/SSD and is not visible in DIsk Utility.  Think of it as the same as install disks you used to get with the system. When you say to erase the disk, you are erasing the partition that houses all the system/data, not the recovery partition.
    See this for general description of OS X recovery, noting it says you can erase your hard drive from thru OS X recovery.
    See this for how to use Time Capsule for recovery
    See this for more details on OS X recovery

  • Reformatted and Restored and Still get Excl Mark

    All seems to stem from downloading a podcast and then when I synched my ipod it froze the system.
    Have had all the usual do not disconnect freezes and pc freezing but have got to a point where I get the folder and exclamation mark appearing on the ipod.
    With further tinkering I have eventually managed to reformat and restore using both the original and latest updater software, got the icon telling me to plug into power to reflash the software but it still returns to the exclm mark.
    Any ideas if there's anything further I can do or does it need to go back to Apple? (I have a week left before warranty expires!!!)

    Just for info I returned my iPod to Apple last week and have just found out my replacement is on the way!!
    Woohoo, and hopefully a whole years warranty for this one - I just hope this one doesnt break down so often.

  • Hi,  Had boot issue and got the following from DU repair function on Macintosh hd: updating boot support.....Error: Disk utility can't repair this disk.....reformat and restore backed up files. How is that done or do I go to Genius?

    In reference to question the computer gave no warning but lost internet connectivity.  I shut down for a while and when returned it would only boot to gray logo screen with spinning gear.  Ran disk utility and on Mac HD drive it stopped after "Updating boot support partitions as required". Then in red: Error: Disk utility can' repair this disk ....disk, and restore backed up files.   I'm running OS X 10.8 and had just updated the iOS about three days ago.  Not familiar with reformat process on MacBook Pro and would like some ideas whether I should go to the Genius Bar here in Sydney or try it on my own.   I have been using time machine to back up to a 1TB La Cie drive right up to the crash.   Thanks for any advice.

    Well it turned out the drive was shot.  Took it to the genius bar yesterday and they ran a test on the drive before trying the restore routine again.  Drive failed. 
    Replaced the drive and got the MBP back today.  Pretty quick and decent service once you get an appointment. 
    Now having trouble figuring how to do the Time Machine  saved files.  Have several applications which I'd like to keep but not sure how to trans the apps from my backup to the new.  Hunting for answers on that on the web.
    Thanks for you help, Eustace.

  • My 2nd gen. ipod became corrupt, how do I reformat and restore it?

    I had my i pod working and tried to take the songs out and put new ones in. Then a error message came up saying my i pod was corrupt. Some how I lost everything and now I don't know how to get anything back into my PC so I can reprogram new songs into the i pod. I can't reformat or restore the i pod because it says the server could not be connected. Can anyone help me fix this issue???   PLEASE!!!!

    Unable to contact the iOS software update server gs.apple.com
    Error 1004, 1013, 1638, 3014, 3194: These errors may be the result of the connection to gs.apple.com being redirected or blocked. Follow these steps to resolve these errors:
    Install the latest version of iTunes.
    Check security software and ensure that communication to gs.apple.com is allowed. Follow these stepsfor assistance with security software.
    Check the hosts file. The restore will fail if there is an active entry to redirect gs.apple.com. Follow theadvanced iTunes Store troubleshooting steps to edit the hosts file or revert to a default hosts file. See "Blocked by configuration: (Mac OS X/Windows) > Rebuild network information."
    Try to restore from another known-good computer and network.
    If the errors persist on another computer, the device may need service.
    The "device may need service" means a hardware problem. In that case make an appointment at the Genius Bar of an Apple store.
    Apple Retail Store - Genius Bar

  • Reformatting and restoring with Time Machine

    I want to reformat my hard drive to de-clutter and improve my computer's performance. I have been using Time Machine for a while to back everything up, so I thought I would just restore with it. But if I do that will I just be reinstalling all of my clutter? Does TM really put a hard drive back EXACTLY as it was before? Any suggestions?

    mabowman wrote:
    I want to reformat my hard drive to de-clutter and improve my computer's performance. I have been using Time Machine for a while to back everything up, so I thought I would just restore with it. But if I do that will I just be reinstalling all of my clutter?
    yes, you will.
    Does TM really put a hard drive back EXACTLY as it was before?
    yes, it does.
    Any suggestions?
    do an erase and install and manually restore only what you need. pretty tedious but is the only way to achieve what you want. after you reinstall you can access your old TM backups in browse mode. control-click on TM in the Dock and choose "browse other TM disks". this will let you browse your old backups and restore what you want where you want to.
    Use [this post|http://discussions.apple.com/message.jspa?messageID=6185507] as a guide on what to restore.

  • Selling old mac, how do you reformat and restore?

    I bought a mac mini off a friend and now I'm getting a new one but first I have to sell the mini.
    My first question is how do I reformat my hard drive, I want to get rid of ALL of my files just to make sure nothing is on it that would compromise my security.
    Also my friend didn't give me the restore discs. So does anyone know the repercusions of using another freinds restore discs?
    I have a Mac Mini 10.4.11 with the superdrive and my friend who has restore discs has a iMac 10.4.11.

    It might work for just the Disk Utility, to zero the drive, but it won't install OSX. If it doesn't work, create a new administrator account, logout, login to the new account, delete all other accounts and their data, empty the trash, then use Disk Utility to Erase Free Space. A single pass of zeros is enough.

  • IMac won't launch, disk utility says I cannot repair my Macintosh HD, back up files, reformat the disk and restore backed up files. How do I do all that? Help!

    iMac won't start up, disk utility tried to repair disk it shows "keys out of order" error message in red and advises me to back up files, reformat disk and restore backed up files. I have no idea how to back up and restore etc... Help! Please!

    Get an external drive of sufficient capacity to hold everything on your internal drive.
    Partition and format the external drive.
    Drive Partition and Format
    1. Open Disk Utility in your Utilities folder.
    2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. 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. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed.
    4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
    5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
    6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
    Clone your internal drive to the external drive.
    Clone Mavericks, Lion/Mountain Lion using Restore Option of Disk Utility
    Boot to the Recovery HD:
    Restart the computer and after the chime press and hold down the COMMAND and R keys until the 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.
         1. Select Disk Utility from the main menu then press the Continue
             button.
         2. Select the destination volume from the left side list.
         3. Click on the Restore tab in the DU main window.
         4. Select the destination volume from the left side list and drag it
             to the Destination entry field.
         5. Select the source volume from the left side list and drag it to
             the Source entry field.
         6. Double-check you got it right, then click on the Restore button.
    Destination means the external backup drive. Source means the internal startup drive.
    Boot from the external drive.
    Boot Using OPTION key:
      1. Restart the computer.
      2. Immediately after the chime press and hold down the
          "OPTION" key.
      3. Release the key when the boot manager appears.
      4. Select the external disk icon from which you want to boot.
      5. Click on the arrow button below the icon.
    Reformat the internal drive and install OS X.
    Install or Reinstall Mavericks, Lion/Mountain Lion from Scratch
    Boot to the Recovery HD:
    Restart the computer and after the chime press and hold down the COMMAND and R keys until the 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.
    Erase the hard drive:
      1. Select Disk Utility from the main menu and click on the Continue button.
      2. After DU loads select your startup volume (usually Macintosh HD) from the
          left side list. Click on the Erase tab in the DU main window.
      3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
          the Security button and set the Zero Data option to one-pass. Click on
          the Erase button and wait until the process has completed.
      4. Quit DU and return to the main menu.
    Reinstall Lion/Mountain Lion, Mavericks: Select Reinstall Lion/Mountain Lion, Mavericks and click on the Install button.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible
                because it is three times faster than wireless.
    Open Startup Disk preferences and set the internal drive as the startup volume, then click on the Restart button.
    Restore your data from your external drive backup.

  • How do i reformat imac hard drive and restore time machine backup?

    How do I reformat my iMac internal hard drive and restore from a Time Machine backup?
    I have an iMac 20" Mid 2007 with a problematic hard drive.
    IntelCore 2 Duo, Processor speed 2 Ghz
    800 Mhz Bus speed
    4 GB RAM
    250 GB Western Digital Hard Drive
    10.6.3
    Was getting a question mark upon booting up, so I booted from a 10.6.3 Snow Leopard CD and ran disk utility. Repair disk was interrupted with an error message. 'Disk utility can't repair disk. Backup files, reformat disk and restore backed up files.'
    1. Should I select Erase, Mac OS Extended Journaled, Erase?
    2. If I do this, won't I lose my networkability, and therefore lose access to Time Machine backups?
    3. If it were you, would you go ahead and replace the hard drive? Not sure I should trust this hard drive!
    4. If I need to replace the hard drive, can you send instructions?
    Thanks!

    Clean Install of Snow Leopard
         1. Boot the computer using the Snow Leopard Installer Disc or the Disc 1 that came
             with your computer.  Insert the disc into the optical drive and restart the computer.
             After the chime press and hold down the  "C" key.  Release the key when you see
             a small spinning gear appear below the dark gray Apple logo.
         2. 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.
             After DU loads select the hard drive entry from the left side list (mfgr.'s ID and drive
             size.)  Click on the Partition tab in the DU main window.  Set the number of
             partitions to one (1) from the Partitions drop down menu, click on Options button
             and select GUID, click on OK, then set the format type to MacOS Extended
             (Journaled, if supported), then click on the Apply button.
         3. When the formatting has completed quit DU and return to the installer.  Proceed
             with the OS X installation and follow the directions included with the installer.
         4. When the installation has completed your computer will Restart into the Setup
             Assistant. Be sure you configure your initial admin account with the exact same
             username and password that you used on your old drive. After you finish Setup
             Assistant will complete the installation after which you will be running a fresh
             install of OS X.  You can now begin the update process by opening Software
             Update and installing all recommended updates to bring your installation current.
    Download and install Mac OS X 10.6.8 Update Combo v1.1.
    If you have your Time Machine backup drive connected, then you can use Setup Assistant to migrate your Home folder, application support files, and third-party applications and system preference files. I recommend doing this via the Setup Assistant when the option appears.

  • On Nov. 22, after having to erase and restore my Western Digital external hard drive (per WD tech support) then rebacking up the iMac, noted that three events put in iPhoto in Sept., Oct.

    On Nov. 22, after having to erase and restore my WD My Passport for Mac external hard drive (per WD tech support) then rebacking up the iMac, I noted that three events loaded into iPhoto in Sept., Oct. and early Nov. had disappeared. They certainly had been there because I printed out several images from these events.  Now they have vanished but everything through August and after Nov. 22 is there. Seems impossible. How  could something disappear from the hard drive? Apple tech was unable to explain or provide a solution. Has anyone else ever had something like this happen?

    How did you reformat the EHD? It should be OS X Extended (journaled) with ownership set to be ignored.
    If the drive is formatted correctly do the following:
    1 - launch iPhoto with the Command+Option keys held down to open the First Aid window. Be sure to follow the circled recommendation in the screenshot.
    2 - run Option #4, Rebuild Database.

  • Every time when I shutdown my 24"iMac, it will start up with a corrupted HD need to be formatted and restored. Anyone has the same problem?

    Every time after shutting down my 24" iMac, it will end up with a corrupted HD which cannot be fixed by disk utility and require to reformat the HD and restore.
    I noticed the Mac OS journal format will turn into no journal. Does anybody have he same problem?

    I have to ask; Are you using the Shut Down... menu item in the "apple" menu to shut down?  Does it shut down normally when you do?

  • Brand new imac 27" keeps crashing randomly in mavericks while idling, using firefox, transferring files, etc.  Reformatted and reinstalled everything from scratch after 15 plus crashes a day.  Crashes now only 4 times a day.  Help!

    Brand new imac 27" keeps crashing.  I'm running 10.9.2 with all software up to date.  It will crash on file tranfers to/from/between external drives, web browsing, word processing, video editing, and even while idling.  It used to crash every 15 minutes when I first got it but I reformatted and reinstalled all software.  Now it it still crashing albeit less often.  This is extremely frustrating because I have no idea what I can do to prevent it from happening!
    Any ideas/help would be greatly appreciated.

    Hmm thanks for the input.  Alright. I uninstalled Avast.  Was good for an hour or so.  I was doing some file browsing and crashed again.  Got this message.
    Anonymous UUID:  
    E3F1F825-B183-F89A-2DD4-2B2D80C38E2A
    Wed Mar 19 22:17:53 2014
    panic(cpu 0 caller 0xffffff8010edbe2e): Kernel trap at 0xffffff8010e340d5, type 14=page fault, registers:
    CR0: 0x000000008001003b, CR2: 0x0000000000000008, CR3: 0x0000000013b1b000, CR4: 0x00000000001606e0
    RAX: 0x0000000000000000, RBX: 0xffffff80114d2ab8, RCX: 0xffffff804e99d7a4, RDX: 0xffffff80114ca830
    RSP: 0xffffff838ecb7d90, RBP: 0xffffff838ecb7dc0, RSI: 0xffffff80114cafb0, RDI: 0x000000000000002e
    R8:  0x0000000000000000, R9:  0x00000000009895b4, R10: 0xffffff83a0570000, R11: 0x0000000000000000
    R12: 0x0000000000000005, R13: 0x0000000000000001, R14: 0xffffff80529d6b20, R15: 0xffffff80114ca4e8
    RFL: 0x0000000000010083, RIP: 0xffffff8010e340d5, CS:  0x0000000000000008, SS:  0x0000000000000010
    Fault CR2: 0x0000000000000008, Error code: 0x0000000000000002, Fault CPU: 0x0
    Backtrace (CPU 0), Frame : Return Address
    0xffffff838ecb7a20 : 0xffffff8010e22fa9
    0xffffff838ecb7aa0 : 0xffffff8010edbe2e
    0xffffff838ecb7c70 : 0xffffff8010ef3326
    0xffffff838ecb7c90 : 0xffffff8010e340d5
    0xffffff838ecb7dc0 : 0xffffff8010e337d5
    0xffffff838ecb7e10 : 0xffffff8010e336ab
    0xffffff838ecb7e40 : 0xffffff8010e4c160
    0xffffff838ecb7f10 : 0xffffff8010ecf359
    0xffffff838ecb7f50 : 0xffffff8010ee1ea6
    0xffffff838ecb7f80 : 0xffffff8010edb3ef
    0xffffff838ecb7fd0 : 0xffffff8010ef34e9
    0xffffff83a0573f50 : 0xffffff8010e375ba
    0xffffff83a0573f90 : 0xffffff8010e37908
    0xffffff83a0573fb0 : 0xffffff8010ed6ff7
    BSD process name corresponding to current thread: kernel_task
    Mac OS version:
    13C64
    Kernel version:
    Darwin Kernel Version 13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20~2/RELEASE_X86_64
    Kernel UUID: 9FEA8EDC-B629-3ED2-A1A3-6521A1885953
    Kernel slide:
    0x0000000010c00000
    Kernel text base: 0xffffff8010e00000
    System model name: iMac14,2 (Mac-27ADBB7B4CEE8E61)
    System uptime in nanoseconds: 7766525033947
    last loaded kext at 4622165777838: com.blackmagic-design.desktopvideo.iokit.framebufferdriver
    9.9. (addr 0xffffff7f93478000, size 20480)
    last unloaded kext at 4682598356442: com.apple.driver.AppleIntelMCEReporter
    104 (addr 0xffffff7f93470000, size 32768)
    loaded kexts:
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