New 27" imac wont boot from leopord dvd

Discussion in 'iMac' started by sancho2, Apr 3, 2010.

  1. macrumors newbie

    Joined:
    Apr 3, 2010
    #1
    Here is the dumb mistake i made and need help fixing. I got the new imac with the Intel i7 and ATI card. I wanted to put windows 7 on a second partition but messed up bad as i erased my mac partition when i was in the windows installer. My imac wont boot from the leopord dvd as i can choose it but it locks up right after i click on the snow leopord dvd icon. I tried to boot from an external hard drive that was formatted from another mac with snow leopord on it and the guid partition is correct. same with a usb drive as it see it but locks up after clicking on it. Anyone know why i cant reinstall? Please im kind of new with mac and really need some help. Thanks gary
    p.s. I tried the option key and pressing c at start up with the dvd in and it can see the install dvd but wont boot into it.
     
  2. Moderator emeritus

    Hellhammer

    Joined:
    Dec 10, 2008
    Location:
    Finland
  3. thread starter macrumors newbie

    Joined:
    Apr 3, 2010
    #3
    my dumb mistake

    Yes i did try your guide and nothing worked. Seems like the imac wont let me reinstall from snow leopard at all. Do you know if there is a utility disk i can get that will let me format the hard drive? Thanks again for the help. If i cant do it from a utility disk I will have to just send back but at least want to try to correct my mistake.
     
  4. Moderator emeritus

    Hellhammer

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #4
    Hmmm, so when you press enter to select the OS X disk, it locks up? Did you run the hardware check (see my guide)? Remember that when you select the OS X disk and press enter, it takes time to boor from it so leave it for 5mins and see is it still in same spot.

    If nothing helps, contact Apple as it can be a hardware failure
     
  5. thread starter macrumors newbie

    Joined:
    Apr 3, 2010
    #5
    Did the hardware check and its ok. Also i waited over an hour for each, the usb install and external hard drive install but just hangs after i click on those icons. It is funny as it will let me start the windows intall from that disk.
     
  6. Moderator emeritus

    Hellhammer

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #6
    Do you CLICK with a mouse or PRESS the ENTER key? You have to PRESS the ENTER key to select where to boot from.

    I would contact Apple because that sounds like a strange issue
     
  7. macrumors 6502a

    Joined:
    May 2, 2007
    #7
    Hey-
    By leopard dvd do you mean the retail snow leopard dvd? If so, you can't boot off that retail disc only the grey disc (disc 1) that came with the imac.
     
  8. Moderator emeritus

    Hellhammer

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #8
    You can use retail version of Snow Leopard, but not Leopard. It's recommended to use the install disks that came with your Mac though because they are system specific.
     
  9. thread starter macrumors newbie

    Joined:
    Apr 3, 2010
    #9
    Yes that is what im using. the one that came with it. think i will just send back to apple at this point but i thank everyone that tried to help.
     
  10. macrumors 6502a

    Joined:
    May 2, 2007
    #10
    Actually, retail disks even of snow leopard will not boot the new imacs...I tried on a 27" imac. (My retail disk is old though so perhaps a 10.6.2 retail snow leopard disk might work) IME, if the computer is newer than the OS X disk, it probably will not boot off of it.
     
  11. macrumors 6502a

    Joined:
    May 2, 2007
    #11
    That's probably the best thing. I had an issue with a MBP not booting off the CD and just did an exchange. They'll probably walk you through the PRAM reset etc before they set you up with the return.
     
  12. thread starter macrumors newbie

    Joined:
    Apr 3, 2010
    #12
    Thanks for all the help as nothing worked so will send back to apple for replacement.
     
  13. macrumors 65816

    Techhie

    Joined:
    Dec 7, 2008
    Location:
    The hub of stupidity
    #13
    The issue is because the build of OS X he is trying to boot from does not support the new processor. The Snow Leopard retail disk was made before the new code necessary to drive the i7 was incorporated in 10.6.2. I had much the same issue while trying to boot an early Leopard DVD on a 2009 Mac Pro. The only restore disk in existence for that machine is the one it came with in it's retail box.
     
  14. Moderator emeritus

    Hellhammer

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #14
    But OP said he is using the disk that came with the iMac so that means the install disks, not retail Snow Leo.

    Yeah, they'll probably ask him to do the same steps he already did
     

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