Black screen on FileVault reboot Mac Pro 4,1

Discussion in 'Mac Pro' started by SolidCake, Sep 26, 2016.

  1. SolidCake, Sep 26, 2016
    Last edited: Sep 29, 2016

    SolidCake macrumors member


    May 20, 2016
    Hey guys,
    Ever since I got my Mac Pro 4,1 and flashed it to 5,1 I am unable to encrypt the main drive using FileVault. When I enable FileVault and reboot from the reboot prompt the Mac boots to a black screen and stays black. My Mac Pro is currently on macOS Sierra but I have had the same issue with El Capitan.

    Mac Pro 4,1 -> 5,1
    2 x Xeon X5690
    32GB 1333MHz DDR3
    Sapphire HD 7950
    macOS Sierra on Samsung EVO 850 500GB

    Can you guys please help me out?
  2. -VoiceOfReason- macrumors member

    Apr 27, 2010
    FileVault presents a login prompt at the boot screen to decrypt the drive and start booting. If your card/monitor configuration doesn't support displaying the boot screen, you'll have to figure out why.

    In the meantime you could try putting in your password blindly and see if it boots.
  3. SolidCake thread starter macrumors member


    May 20, 2016
    That sounds like what is going on! I have had the same problem with the stock NVIDIA GeForce GT 120. So, this could be a display issue as I bought a UltraSharp UP2516D with the Mac Pro. I'll try it!

    What is the best way to go about logging in blind?
  4. orph macrumors 68000


    Dec 12, 2005
    sounds odd, if it's an apple GT120 then you will have boot screen, do you have a second display to try?
    might be worth asking on the apple forums

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