Mac Pro 2008 "Option" or Boot Manager wont access or not working after chime {need help}

Discussion in 'Mac Pro' started by TechJhoe., May 6, 2018.

  1. TechJhoe. macrumors newbie

    Joined:
    Apr 26, 2018
    Location:
    Dubai
    #1
    so i have an issue on my mac pro 2008, i accidentally reformat my desktop because of very laggy performance, now im trying to reinstalled my OS X using recovery mode but after signing in my apple i.d there is an error that cannot verrify my email adrress, so i buy a new SSHD to install fresh OS X but i have the same issue. now i download a el capitan OS X on the internet to make a bootable USB, but while installing there is an error saying the "corrupted files" and i cant access the boot manager pressing "OPTION" key after the chime

    please i need help to recover my desktop
     
  2. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    If ecovery partiton won’t work, and you can’t install OSX on an external USB 3.0 HDD by another Mac, burn an OS installation disc usually can make your life easier.

    For boot manager, which GPU you are running now? What do you mean “not working”, black screen or white screen?
     
  3. TechJhoe., May 6, 2018
    Last edited: May 6, 2018

    TechJhoe. thread starter macrumors newbie

    Joined:
    Apr 26, 2018
    Location:
    Dubai
    #3



    Black Screen only and on my monitor it detect no signal until it sleep. i tried also to used bootable usb but the problem is i cannot access the boot manager "OPTION Key" after the chime.

    i can access only is the recovery mode which is Command R but there is also problem while on installing OS it says corrupted files but i tried many el capitan installer same problem please help

    and for the GPU the ATI HD 2600 XT are not working only the NVdia 1GB card i forgot the model number.

    is there anything wrong if my GPU has a problem while installing new OSX
     

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