I am trying to reinstall Snow Leopard on my iMac (Spring '08)...

I am trying to reinstall Snow Leopard on my iMac (Spring '08) and part way through the install my screen shuts off and does nothing but my computer is still running. I've turned it off, unplugged it and let it sit for about 10 minutes. I turn it back up and hold down "c" to boot from disk and the install screen pops back up. I do a disk check and it passes so I try to install again, which it says it can restore the last install's process and then begins installing again. After about 10-15 minutes my screen shuts off and goes to sleep, my mouse and keyboard will not wake it up. All I have plugged in is the mighty mouse and keyboard. This is getting frustrating...

Reset the SMC
The computer sleeps or shuts down unexpectedly.
https://support.apple.com/kb/HT3964

Similar Messages

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    After rebooting my computer, there is only the flashing folder with "?" on it. I tried several things like PRAM resetting and whatnot, but nothing worked. I then tried to reinstall Snow Leopard, but it appears there is no hard disc to be found to install it. I also wanted to repair the disk first but it wasn't present in disk utilities. Did I lose my hard drive, or is this still salvagable?

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    Hi I am trying to install snow leopard onto my iMac g5 currently running 10.3.9. I open disk ,click install- nothing happens. Any ideas? Thanks Dan

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    Regards.

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    Download and install Mac OS X 10.6.8 Update Combo v1.1.
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    Thanks

    Reinstall OS X without erasing the drive
    Do the following:
    1. Repair the Hard Drive and Permissions
    Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. 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 installer.
    If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
    2. Reinstall Snow Leopard
    If the drive is OK then quit DU and return to the installer.  Proceed with reinstalling OS X.  Note that the Snow Leopard installer will not erase your drive or disturb your files.  After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
    Download and install the Combo Updater for the version you prefer from support.apple.com/downloads/.

  • I have installed mountain lion on my macbook pro ,but it made my mac very slow. Would someone please tell me how  to uninstall this one and reinstall snow leopard?

    Hello,
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    Thanks

    It would be easier to just fix whatever is making your machine slow.
    I wrote a little diagnostic program to help show what might be causing these problems. Download EtreCheck from http://www.etresoft.com/download/EtreCheck.zip, run it, and paste the results here.
    Disclaimer: Although EtreCheck is free, there are other links on my site that could give me some form of compensation, financial or otherwise.

  • Error message when trying to install snow leopard

    Hello,
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    See the following:
    How to Install OS X Updates Successfully
    A. Repair the Hard Drive and Permissions:
    Boot from your current OS X Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Utilities menu. 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 installer. Now restart normally. 
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    Open Disk Utility from the Utilities folder.
    Select the destination volume from the left side list.
    Click on the Restore tab in the DU main window.
    Check the box labeled Erase destination.
    Select the destination volume from the left side list and drag it to the Destination entry field.
    Select the source volume from the left side list and drag it to the Source entry field.
    Double-check you got it right, then click on the Restore button.
    Destination means the external backup drive. Source means the internal startup drive.
    C. Important: Please read before installing:
    If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
    You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
    The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update.  While the installation is in progress do not use the computer.
    D. To upgrade:
    Purchase the Snow Leopard Retail DVD.
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    Insert OS X Installer Disc into the optical drive.
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    Release the key when the spinning gear below the dark gray Apple logo appears.
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    Use Software Update, or
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  • ESATA is no longer recognized after I reinstalled snow leopard

    I have been using an Iogear 2-port adaptor card for an eSATA connection for Time Machine backups, have just reinstalled snow leopard because of the spinning beach ball (told to do it at the store). No other problems with the reinstall that I can tell yet, but now I can't make get it to recognize the eSATA connection. Have tried replugging and turning everything on and off. Any suggestions? Thanks-

    Have you checked with vendor for your adapter card to see if they have an updated driver for Snow Leopard?
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  • How do I reinstall Snow Leopard Server on a Mac Mini Server 2010?

    How do I reinstall Snow Leopard Server on a Mac Mini Server 2010? I have already attached a Mac Superdrive and tried to download, but the buttons at the bottom of the dialog screen are greyed out.

    Not sure where you're getting tangled here or how much you know about OS X Server 10.6, so...
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