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TS3926: OS X Lion: Installer reports "This disk cannot be used to start up your computer"

Learn about OS X Lion: Installer reports "This disk cannot be used to start up your computer"

TS3926 Can't use internet recovery function to restore operating system

1120 Views 4 Replies Latest reply: Jan 13, 2013 10:02 AM by Kappy RSS
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Jan 12, 2013 10:34 AM

Hi All.

Mac Osx lion recovery partition has been pre-installed on my Imac Intel 27 inch after it has been to the repair shop. Tried to use the internet recover osx lion funtion but just has error message. Please try again. I can't seem to install Osx lion on the new hard disk. Internet is working? Just says try again.

Any tips greatfully received

iMac, Mac OS X (10.7)
  • Kappy Level 10 Level 10 (221,015 points)

    I thought you said it was already installed at the repair shop. Why, then, do you need to reinstall it?


    Are you doing this:


    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.

  • Kappy Level 10 Level 10 (221,015 points)

    I'm puzzled still. Was OS X installed for you on the new drive by the repair shop? Are you saying this drive is blank but it has a Recovery HD partition? I'm puzzled how that could happen because one must install Lion or Mountain Lion to a new drive in order to get the Recovery HD partition. There is nothing wrong with Lion.


    Here's what I'd like you to do. Open Disk Utility. Select your disk entry, the entry that displays the disk manufacturer, drive model number and size. Click on the Partition tab in DU's main window. Now, press COMMAND-SHIFT-4. Use the crosshairs to select the entire DU window. When you release the mouse button an image file will appear on your Desktop. Use the Camera icon you see in the toolbar of the message composition window here and post your image in the message.


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