usb os and black screen|mac pro 2009 4.1

Discussion in 'Mac Pro' started by EirikStrand1996, Jun 12, 2017.

  1. EirikStrand1996 macrumors newbie

    Joined:
    May 2, 2017
    #1
    Hi, i have a mac pro 2009 4.1, its got 7gb of ram right now and a ssd and 1tb hhd and a gtx 660ti.
    so when i put my usb install os nothing happens on the screen, i just stays black, why is this ?
     
  2. BillyBobBongo macrumors 68020

    BillyBobBongo

    Joined:
    Jun 21, 2007
    Location:
    On The Interweb Thingy!
    #2
    Sounds to me like you have a standard PC graphics card in your machine. You need to drop your original graphics card back in, would be either a NVIDIA GeForce GT 120 or an ATI Radeon HD 4870. PC graphics card do not have the necessary EFI to see the 'boot screen'.
     
  3. orph macrumors 65816

    Joined:
    Dec 12, 2005
    Location:
    UK
    #3
    what os is it on the USB stick?
    iv got a pc GPU and have not had a problem with booting from USB osx installers or recovery partitions.

    just go to system prefes chose the boot drive, click reboot

    unless your trying to boot a OS thats so old it wont work with your card?
     

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