Boot is slow until the bootscreen appears

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

  1. jannisl macrumors newbie

    Jan 25, 2017
    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?

  2. DeltaMac macrumors G3


    Jul 30, 2003
    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

    Jan 25, 2017
    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


    Apr 30, 2012
    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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