Boot is slow until the bootscreen appears

Discussion in 'macOS Sierra (10.12)' started by jannisl, Jan 25, 2017.

  1. jannisl macrumors newbie

    Joined:
    Jan 25, 2017
    #1
    Hey guys,

    I got a MacPro 5.1 Mid.2010 and have a strange problem. It takes about 20 seconds until the bootscreen appears.

    My specs:
    3.33Ghz 6-Core Intel Xeon
    32GB 1333Mhz DDR3
    ATI HD 5770 1024MB

    Boot drive: Samsung SSD 850 EVO 250 GB (Sata)
    Two original Apple HDDs in RAID (Each 1TB)

    What I already tried:
    - Reset PRAM
    - Unplug everything except Mouse, Keyboard and Display
    - Change start volume to the SSD
    - Enable Trim on the SSD

    The whole OS is really fast and snappy. Everything works great (Except this boot glitch: )

    Is it normal that it takes so long to boot? And how can I fix it?

    Thanks,
    Jannis
     
  2. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #2
    Your video shows a line of random garbage appears on the screen. Do you always see that at boot?
    Could indicate a problem with the graphics card.
    You should try reseating the graphics card.
    It's quick, easy, and free - and might actually help... :D
     
  3. jannisl thread starter macrumors newbie

    Joined:
    Jan 25, 2017
    #3
    I did already try this. But it only happens in Sierra so I think it have to be something software related.
     
  4. dictoresno macrumors 601

    dictoresno

    Joined:
    Apr 30, 2012
    Location:
    NJ
    #4
    Mine just started doing this too. I'll reboot the machine and the screen will be blank for 30 seconds before the apple logo appears.

    I just installed an SSD and was clocking almost 60 seconds in boot time because of the blank screen that wasted 30-35 seconds of that before the regular boot screen appears. After that it's fine.

    But last reboot was better, almost perfectly normal.
     

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