HT1338 How do I re-install Mountain Lion in my iMac?

I have the latest iMac 27" that I got last December.  I was wondering how I go about re-installing the IOS that is on the hard drive. 

With OS X Lion or Mountain Lion, you just need OS X Recovery to reinstall OS X and do more things like restore Time Machine backups, repair drives, reset user passwords... See > http://support.apple.com/kb/HT4718
To reinstall OS X, hold Command and R keys while your Mac is starting to start in OS X Recovery, and reinstall OS X

Similar Messages

  • How do I re-install Mountain Lion on a new hard drive (replacement)?

    I have an older iMac 24" (2007) that has been up-graded to Mountain lion.  I want to replace my hard drive with a bigger one (has 500Gb).  How can I re-install Mountain Lion on my new drive?  I have Time Machine on this machine.

    Install 10.6 and 10.8 onto the new drive exactly how you did it on the old drive, except that you won't need to pay to redownload 10.8. Alternatively, if you kept a copy of the 10.8 installer, you can just rerun it.
    (72891)

  • I just installed Mountain Lion on my iMac that was previously running Snow Leopard. Bugt I found that some key applications no longer work, so I would like to go back to snow Leopard. I can't use time machine backups for this. what can I do?

    I just installed Mountain Lion on my iMac. But In was dismayed to find that my Canon scanner software (Canoscan LIDE500F)no longer works. Nor do any of my MS offce applications. I tried to use time machine to reinstall Snow Leopard (my previous operating system), but unfortunately my time machine backups did not include system software. Also, the original system install disk that came with my iMac would not allow me to install Snow Leopard in place of Mountain Lion. I would appreciate it if somebody could tell me how to solve this problem.

    The reason your Office doesn't work is because it is PowerPC code. If you will upgrade the 2004 Office to 2011 Office then that will work.
    I don't understand how you managed to get your Time Machine backup to not backup the system.
    Now if you still what to downgrade you will have to erase the disk and reinstall Snow Leopard. Most likely all of your application and then restore your data from Time Machine.
    To me it sounds like it would be easier to upgrade your software and stay with Mountain Lion instead.
    Allan

  • I installed Mountain Lion on my iMac. Now I cannot access the Internet. All the other computers and tablets have no problem. I did PRAM and MC reset, modem reset, etc., all the usual ju-ju. I also cannot connect on my local network to any other computer.

    I installed Mountain Lion on my iMac. Now I cannot access the Internet. All the other computers and tablets on the network have no problem. I did PRAM and MC reset, modem reset, etc., all the usual ju-ju. I also cannot connect on my local network to any other computer. Yet Network control panel says I am connect to the modem, and Network Diagnosis says I am connected to the Internet. It's like the blind man who has eyes that cannot see. BTW, I am not some newbee. I have been a Machead since the early nineties and set up a half dozen networks, including the one I am using at home to which the iMac mysteriously is there but not. This has me stumped! I am considering going back to 10.7!

    Select  ▹ System Preferences ▹ Network ▹ Advanced ▹ TCP/IP. What values are shown for the following:
    Configure IPv4
    IPv4 Address
    Subnet Mask
    Router

  • May I install Mountain Lion on my iMac MA199LL/A? It has a 1.83 GHz Core Duo.

    May I install Mountain Lion on my iMac MA199LL/A? It has a 1.83 GHz Intel Core Duo processor.

    You can not.
    OS X Mountain Lion system requirements
    To install Mountain Lion, you need one of these Macs:
    iMac (Mid 2007 or newer)
    MacBook (Late 2008 Aluminum, or Early 2009 or newer)
    MacBook Pro (Mid/Late 2007 or newer)
    MacBook Air (Late 2008 or newer)
    Mac mini (Early 2009 or newer)
    Mac Pro (Early 2008 or newer)
    Xserve (Early 2009)
    Your Mac needs:
    OS X v10.6.8 or OS X Lion already installed
    2 GB or more of memory
    8 GB or more of available space

  • How do I re-install mountain lion if my macbook air is in this state?

    I just now had the bright idea of restoring my mac and wiping it clean. I'm currently in the start-up process and I can't re-install mountain lion because I never bought it. I bought this macbook air from an aquaintence last year. How do I upgrade to mountain lion if my mac is like this?  Is this issue really as simple as upgrading?

    cschnupp wrote:
    The software on the macbook was the most recent.  It had already been upgraded to mountain lion by the previous owner.
    Does the original owner or yourself have a Snow Leopard istall disc? I'm guessing no.
    Unfortunately it looks like my situation has worsened. I'll click re-install mountain lion then continue and a message saying "to download and restore os x, your computer's eligibility will be verified with apple." I'll click continue and another message will appear saying something like "could not install to drive please contact applecare."  I am no longer being asked to enter my apple id or password.  I fear this is a "you have tried x amount of times so you are now locked out" situation.  Thanks to both of you for responding so soon!
    That I'm not sure of. If it were me I'd still buy a copy of SL as it's cheap and partition the hard drive so I have two OS on the same disc, (make the SL partiton about 25GB). You can use one to trouble shoot the other sometimes. It also means you can boot from DVD which I like.

  • Can I install mountain lion on my Imac

    I have a late model 2006 Imac with 4gb of RAM, I would like to install mountain lion, is this possible.

    No.
    (125674)

  • After installing Mountain Lion on my Imac, volume keys and scroll function are disabled.

    I just installed Mountain Lion on my 2 year old Imac and now the keyboard volume controls don't work and the scroll function on my magic mouse has stopped as well. All these were working fine until the install. I have seen other posts of people having the same problem but haven't seen any definite solutions yet. Really annoying "benefit" to upgrading.

    For the mouse scrolling issue, check the setting in System Preferences > Accessibility > Mouse & Trackpad > Mouse options... button > check Scrolling.

  • How do I directly install Mountain Lion Server?

    I'd like to upgrade my Lion Mac Mini Server to Mountain Lion. Currently I'd have to update it to 10.8 Client, then on the server, install the Server app. Is there anyway to consolidate those two steps into one? I'd like to directly install 10.8 Server so I could perform remote setup of the server in one step. Is that possible?

    From what I understand, you would need to update the OS X Lion Server to the 10.8 Client version followed by the OS X 10.8 Server Add-on. I am not too sure if Apple is providing an unified step for this kind of procedure.

  • Can i install mountain lion on my imac as well as my macbook?

    I have downloaded mountain lion 10.8.2 to my macbook. Can I also put this on my imac? If so, how do I do it?

    Yes you can.  You need to log into the Mac App Store, on your iMac, using the EXACT same "Apple ID" that you used to download Mountain Lion to your MacBook, go to your Purchases list for that ID and download ML again for Free to the iMac.
    Hope this helps

  • HT1148 Installed Mountain Lion - Now my IMAC hangs in a short loop (1 sec) at least once every other day.

    Updated my IMAC from Lion to Mountain Lion. Processor 2.93GHz Intel Core 2 Duo, 4 Mag 1067 MHz DDR3. Now (usually when I am running two software items) my IMAC hangs up about once a day or so. It seems like a short 1 sec repeat. At that point the only way to stop it is to shut down using the main power button. Is anyone else having this problem? I never had a problem until I upgraded. I'm 99% sure it must be in the operating system. Can anyone tell me what's going on? Has Apple found this glitch in Mountain Lion and will they be coming out with a fix?

    I was having a similar issue, my 27" iMac would lose the Internet connection, but not the wifi, later I'd find that the machine had restarted giving me a notice that there'd been a kernel panic. It was happening persistently after upgrading to Mountain Lion.
    I used CCleaner to clear caches and now two days later I've had no problems.
    I'm relieved that I didn't have to resort to more complex solutions.

  • I have not updated since Snow Leppard- how an i now download mountain lion to my imac..

    I currently have Snow Leppard on my iMac.. I bought Mountain Lion, but it wont download to my hard drive.. HELP, please..

    Your Tag states that you have OS X 10.5  that is Leopard...
    Snow Leopard is OS X 10.6
    Goto the Apple Icon... Top left of a Finder window...
     > About this Mac > Version...what does it say?

  • HT1338 How long does it take Mountain Lion to download?

    I purchased the upgrade about 4 hours ago and it has been supposedly "downloading" since then with no cues or prompts.  How long will this take and when should I expect to have to do something to help it along?  Thanks very much.

    Go to sleep. When you get up in the morning it will be waiting for you to install.
    Tip: Before you install quit out of the installer, then go to /Applications/ "Install OS X.app" and copy the installer off to some other media, a pocket drive, another hard drive. Then double-click the "Install OS X.app" to do the install. This is because after it's installed the installer self-destructs. So, if you have another Mac you want to install on, or for safe keeping in case you ever need it again, save it.

  • After installing Mountain Lion on my iMac, calendar items disappeared.

    My iPhone, iPad and MBP still have the calendar contents. The one item that still appears on the calendar is a holiday schedule I downloaded from another site a few years ago. I checked the preferences on the iMac and "Calendar" is checked for iCloud. Thanks for any help/suggestions!

    Strange as it seems and without having resolved my problem, I decided to enter an appointment fo tomorrow. When I double-clicked tomorrow's date on the calendar to enter the information, like magic, the other appointments appeared.
    Therefore, double-clicking a date on the calendar was the answer or it was a magnificent coincidence of timing!

  • Fresh install mountain lion

    I am having to many crashes on my Mountain Lion (upgraded from Snow Leopard) and want to reinstall Mountain Lion and see if this doesn't work. My Mac crashed about once or twice a week and most recently this caused my Outlook for Mac to be corrupted. Tied to rebuild DB but it is not working.
    How can I fresh install Mountain Lion removing all from my HDD and recovering my data safely?

    Found my old Mail, so basically back to normal.
    However had two crashes since I've done everything and now I am concerned that my Mac issue might be hardware related:
    Interval Since Last Panic Report:  98 sec
    Panics Since Last Report:          1
    Anonymous UUID: 23CD7216-4D50-7B4A-8707-9F5D58539F0F
    Thu Oct 11 08:09:45 2012
    panic(cpu 0 caller 0xffffff7f84da8b25): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff80a3c66000 0x0a5480a2, D0, P3/4
    Backtrace (CPU 0), Frame : Return Address
    0xffffff80800daf80 : 0xffffff800461d626
    0xffffff80800daff0 : 0xffffff7f84da8b25
    0xffffff80800db080 : 0xffffff7f84ea24b3
    0xffffff80800db0e0 : 0xffffff7f84ea2527
    0xffffff80800db150 : 0xffffff7f851b7853
    0xffffff80800db290 : 0xffffff7f84ec8659
    0xffffff80800db2c0 : 0xffffff7f84db28da
    0xffffff80800db370 : 0xffffff7f84dadfac
    0xffffff80800db560 : 0xffffff7f84daf1d8
    0xffffff80800db630 : 0xffffff7f85e1345e
    0xffffff80800db6f0 : 0xffffff7f85e4400f
    0xffffff80800db770 : 0xffffff7f85e28b4a
    0xffffff80800db7d0 : 0xffffff7f85e29415
    0xffffff80800db820 : 0xffffff7f85e2980f
    0xffffff80800db8c0 : 0xffffff7f85e2a239
    0xffffff80800db900 : 0xffffff7f85de5e81
    0xffffff80800dba80 : 0xffffff7f85e267fe
    0xffffff80800dbb40 : 0xffffff7f85de498a
    0xffffff80800dbba0 : 0xffffff8004a65bc9
    0xffffff80800dbbc0 : 0xffffff8004a67170
    0xffffff80800dbc20 : 0xffffff8004a64b8f
    0xffffff80800dbd70 : 0xffffff80046981e1
    0xffffff80800dbe80 : 0xffffff8004620aed
    0xffffff80800dbeb0 : 0xffffff8004610448
    0xffffff80800dbf00 : 0xffffff800461961b
    0xffffff80800dbf70 : 0xffffff80046a5b16
    0xffffff80800dbfb0 : 0xffffff80046ced53
          Kernel Extensions in backtrace:
    com.apple.NVDAResman(8.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f84d41 000->0xffffff7f85043fff
    dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f84caf000
    dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f84d2d000
    dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f84cea000
    com.apple.nvidia.nv50hal(8.0)[9F3D09B5-3158-3D9E-BDA3-E71576AAD3B7]@0xffffff7f8 5051000->0xffffff7f85373fff
    dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f84d 41000
    dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f84caf000
             com.apple.GeForce(8.0)[2E56ED9A-D848-3795-9E52-56BABDC9000C]@0xffffff7f85dd8000 ->0xffffff7f85e9afff
    dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f84d 41000
    dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f84d2d000
    dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f84caf000
    dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f84cea000
    BSD process name corresponding to current thread: WindowServer
    Mac OS version:
    12C60
    Kernel version:
    Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
    Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
    Kernel slide: 0x0000000004400000
    Kernel text base: 0xffffff8004600000
    System model name: MacBookPro6,2 (Mac-F22586C8)
    System uptime in nanoseconds: 590434395070
    last loaded kext at 55988573983: com.apple.driver.AppleHWSensor   1.9.5d0 (addr 0xffffff7f86a31000, size 36864)
    last unloaded kext at 254906129098: com.apple.driver.AppleUSBUHCI          5.2.5 (addr 0xffffff7f85637000, size 65536)
    loaded kexts:
    com.apple.driver.AppleHWSensor   1.9.5d0
    com.apple.driver.AudioAUUC           1.60
    com.apple.driver.AGPM        100.12.69
    com.apple.filesystems.autofs            3.0
    com.apple.driver.AppleMikeyHIDDriver     122
    com.apple.driver.AppleHDA 2.3.1f2
    com.apple.driver.AppleUpstreamUserClient          3.5.10
    com.apple.GeForce    8.0.0
    com.apple.driver.AppleIntelHDGraphics    8.0.0
    com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport            4.0.9f33
    com.apple.driver.AppleMikeyDriver           2.3.1f2
    com.apple.driver.SMCMotionSensor           3.0.2d6
    com.apple.driver.AppleIntelHDGraphicsFB            8.0.0
    com.apple.driver.AppleSMCLMU     2.0.2d0
    com.apple.driver.AppleMuxControl            3.2.11
    com.apple.driver.AppleMCCSControl          1.0.33
    com.apple.driver.AppleSMCPDRC   1.0.0
    com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
    com.apple.driver.AppleLPC  1.6.0
    com.apple.iokit.IOUserEthernet       1.0.0d1
    com.apple.iokit.IOBluetoothSerialManager            4.0.9f33
    com.apple.Dont_Steal_Mac_OS_X      7.0.0
    com.apple.driver.ApplePolicyControl          3.2.11
    com.apple.driver.AppleUSBTCButtons        235.4
    com.apple.driver.AppleUSBCardReader     3.1.0
    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless      1.0.0d1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib  1.0.0d1
    com.apple.BootCache            34
    com.apple.driver.AppleUSBTCKeyboard    235.4
    com.apple.driver.AppleIRController            320.15
    com.apple.iokit.SCSITaskUserClient            3.5.1
    com.apple.driver.XsanFilter 404
    com.apple.iokit.IOAHCIBlockStorage           2.2.2
    com.apple.driver.AppleFWOHCI      4.9.6
    com.apple.driver.AppleUSBHub      5.2.5
    com.apple.driver.AirPort.Brcm4331           602.15.22
    com.apple.driver.AppleAHCIPort     2.4.1
    com.apple.iokit.AppleBCM5701Ethernet   3.2.5b3
    com.apple.driver.AppleUSBEHCI     5.4.0
    com.apple.driver.AppleSmartBatteryManager      161.0.0
    com.apple.driver.AppleEFINVRAM  1.6.1
    com.apple.driver.AppleRTC  1.5
    com.apple.driver.AppleACPIButtons           1.6
    com.apple.driver.AppleHPET           1.7
    com.apple.driver.AppleSMBIOS       1.9
    com.apple.driver.AppleACPIEC        1.6
    com.apple.driver.AppleAPIC            1.6
    com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
    com.apple.nke.applicationfirewall   4.0.39
    com.apple.security.quarantine        2
    com.apple.driver.AppleIntelCPUPowerManagement        196.0.0
    com.apple.kext.triggers         1.0
    com.apple.driver.DspFuncLib          2.3.1f2
    com.apple.iokit.IOAudioFamily         1.8.9fc10
    com.apple.kext.OSvKernDSPLib      1.6
    com.apple.nvidia.nv50hal    8.0.0
    com.apple.NVDAResman      8.0.0
    com.apple.iokit.AppleBluetoothHCIControllerUSBTransport       4.0.9f33
    com.apple.driver.AppleSMBusPCI   1.0.10d0
    com.apple.iokit.IOFireWireIP           2.2.5
    com.apple.driver.AppleBacklightExpert     1.0.4
    com.apple.driver.AppleSMBusController    1.0.10d0
    com.apple.driver.AppleHDAController        2.3.1f2
    com.apple.iokit.IOHDAFamily           2.3.1f2
    com.apple.driver.IOPlatformPluginLegacy 1.0.0
    com.apple.driver.IOPlatformPluginFamily 5.2.0d16
    com.apple.iokit.IOSurface     86.0.3
    com.apple.iokit.IOSerialFamily         10.0.6
    com.apple.iokit.IOBluetoothFamily  4.0.9f33
    com.apple.driver.AppleSMC 3.1.4d2
    com.apple.driver.AppleGraphicsControl     3.2.11
    com.apple.iokit.IONDRVSupport      2.3.5
    com.apple.iokit.IOGraphicsFamily    2.3.5
    com.apple.iokit.IOSCSIBlockCommandsDevice       3.5.1
    com.apple.iokit.IOUSBMassStorageClass     3.5.0
    com.apple.driver.AppleUSBMultitouch       235.7
    com.apple.iokit.IOUSBHIDDriver     5.2.5
    com.apple.driver.AppleUSBMergeNub       5.2.5
    com.apple.driver.AppleUSBComposite        5.2.5
    com.apple.iokit.IOSCSIMultimediaCommandsDevice        3.5.1
    com.apple.iokit.IOBDStorageFamily 1.7
    com.apple.iokit.IODVDStorageFamily          1.7.1
    com.apple.iokit.IOCDStorageFamily 1.7.1
    com.apple.iokit.IOAHCISerialATAPI 2.5.0
    com.apple.iokit.IOSCSIArchitectureModelFamily   3.5.1
    com.apple.iokit.IOFireWireFamily    4.5.5
    com.apple.iokit.IO80211Family       500.15
    com.apple.iokit.IOUSBUserClient     5.2.5
    com.apple.iokit.IOAHCIFamily          2.2.1
    com.apple.iokit.IOEthernetAVBController  1.0.2b1
    com.apple.iokit.IONetworkingFamily           3.0
    com.apple.iokit.IOUSBFamily            5.4.0
    com.apple.driver.AppleEFIRuntime            1.6.1
    com.apple.iokit.IOHIDFamily            1.8.0
    com.apple.iokit.IOSMBusFamily       1.1
    com.apple.security.sandbox 220
    com.apple.kext.AppleMatch 1.0.0d1
    com.apple.security.TMSafetyNet     7
    com.apple.driver.DiskImages           344
    com.apple.iokit.IOStorageFamily      1.8
    com.apple.driver.AppleKeyStore     28.21
    com.apple.driver.AppleACPIPlatform         1.6
    com.apple.iokit.IOPCIFamily 2.7.2
    com.apple.iokit.IOACPIFamily          1.4
    com.apple.kec.corecrypto     1.0
    Model: MacBookPro6,2, BootROM MBP61.0057.B0F, 2 processors, Intel Core i5, 2.4 GHz, 4 GB, SMC 1.58f15
    Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
    Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 256 MB
    Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
    Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.98.81.22)
    Bluetooth: Version 4.0.9f33 10885, 2 service, 11 devices, 1 incoming serial ports
    Network Service: Ethernet, Ethernet, en0
    Serial ATA Device: Hitachi HTS545032B9SA02, 320,07 GB
    Serial ATA Device: MATSHITADVD-R   UJ-898
    USB Device: hub_device, 0x0424  (SMSC), 0x2514, 0xfa100000 / 2
    USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, 0xfa120000 / 5
    USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 4
    USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 3
    USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 7
    USB Device: hub_device, 0x0424  (SMSC), 0x2514, 0xfd100000 / 2
    USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4
    USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 3

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