usb os and black screen|mac pro 2009 4.1

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

  1. EirikStrand1996 macrumors newbie

    May 2, 2017
    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


    Jun 21, 2007
    On The Interweb Thingy!
    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 68000


    Dec 12, 2005
    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?

Share This Page