MacOS Mojave - Brief Black Screen after Login

Discussion in 'macOS Mojave (10.14)' started by Venderious, Sep 28, 2018.

  1. Venderious macrumors regular

    Venderious

    Joined:
    Dec 15, 2014
    Location:
    Groningen
    #1
    Hello.

    After the recent update to MacOS Mojave, I've been experiencing some issues. After bootup, the login screen appears and logs me in like normal. After login, however, a black screen appears followed by the Apple logo. Only after the Apple Logo shows I am on the homescreen. Does anyone know how to fix this problem?

    Below is the order of the bootup, only after the Apple logo I'm greeted with the homescreen.
    [​IMG]
     
  2. josduc macrumors member

    Joined:
    Oct 8, 2010
    #2
    Glad to see I'm not the only one seeing this behavior. I'm on a 2017 iMac. Booted into safe mode to no result.
     
  3. niji, Sep 28, 2018
    Last edited: Sep 28, 2018

    niji Contributor

    niji

    Joined:
    Feb 9, 2003
    Location:
    tokyo
    #3
    hi

    i am having the same thing happen to me.

    i am convinced it is related to the Dynamic desktop.

    if Dynamic desktop is not turned on, then i do not experience this.
    with Dynamic desktop turned on, it always happens.

    my machine:
    Model Name: MacBook Air
    Model Identifier: MacBookAir7,2
    Processor Name: Intel Core i7
    Processor Speed: 2.2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache (per Core): 256 KB
    L3 Cache: 4 MB
    Memory: 8 GB
    Boot ROM Version: MBA71.0178.B00
    SMC Version (system): 2.27f2

    as kernal panics go, its only a brief (very short time required being needed to reset itself) one.
    but it is annoying.

    my time zone is set to Automatic.
    and i have tried to ensure that all possibly meaningful permissions are given to any possible Location info being required.
    I'm wondering if its a problem of the startup sequence not getting its needed / expected info for timezone and / or actual current time, quick enough during the boot up process and then causing this temporary crash.
     
  4. Venderious thread starter macrumors regular

    Venderious

    Joined:
    Dec 15, 2014
    Location:
    Groningen
    #4
    I'm not sure whether this is linked to dynamic desktop. I did set my wallpaper to a dynamic desktop shortly after updating, but changed it after. The issue still persists. However, I've always found that the login screens on mac computers have many issues with bugs.
     
  5. Khaleal macrumors regular

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    Aug 24, 2013
  6. EdwardC macrumors regular

    EdwardC

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    Jun 3, 2012
    Location:
    Georgia
    #6
    Same issue here on a late '13 iMac as well as a 2012 mini. Dynamic on the mini only, same problem with both. Fire vault is off.
     
  7. Venderious thread starter macrumors regular

    Venderious

    Joined:
    Dec 15, 2014
    Location:
    Groningen
    #7
    I do have FileVault turned on.
     
  8. Khaleal macrumors regular

    Joined:
    Aug 24, 2013
    #8
    Mojave has an issue where during boot, the screen will go black for a second and then come back and continue booting, since you have FileVault, you're prompted to login before the OS boots, and that's why you experience the black screen after "login"
     
  9. Venderious thread starter macrumors regular

    Venderious

    Joined:
    Dec 15, 2014
    Location:
    Groningen
    #9
    That could indeed be the case. A few student in my university are experiencing the same issue, they all have filevault turned on as well.
     
  10. Dc2006ster, Sep 28, 2018
    Last edited: Sep 28, 2018

    Dc2006ster macrumors regular

    Joined:
    Jun 9, 2011
    Location:
    Alberta, Canada
    #10
    I also have this issue. do not have FileVault on and use auto login so I do not have to login at startup.

    The duration and of the black out is shorter if I do not have external drives turned on. When the drives are turned on there is activity on those drives during the blackout. Also, I removed third party ram in order to try and identify the cause of kernel panics that occurred even with high Sierra and this also shortened the black out time.

    The behaviour is not predictable. This morning the blackout was very short and occurred at a different point in the progress bar and overall the startup was much slower than usual.
     
  11. upandown macrumors 6502a

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    Apr 10, 2017
  12. Marcopolo53 macrumors regular

    Joined:
    Oct 21, 2016
    Location:
    Toronto
    #12
    Have same issue during the boot up process. Screen goes black for 1 sec then resumes boot up to eventual Login screen. This happens on late 2012 iMac and early 2016 Retina MacBook. Do not have FileVault enabled on either machine. Had similar black out resume loading on early HS 10.13.1, 10.13.2 and 10.13.3. Only fixed on 10.13.4 or maybe 10.13.3 Supplemental
     
  13. waquzy, Sep 28, 2018
    Last edited: Sep 28, 2018

    waquzy macrumors 6502a

    waquzy

    Joined:
    Sep 9, 2013
    Location:
    Leicestershire, UK
    #13
    I have the exact same login process on my 2017 MBP.

    FileVault is turned on.
     
  14. b1ack macrumors newbie

    Joined:
    Aug 24, 2018
    #15
    Same problem and for me the login screen lags too
     
  15. Venderious thread starter macrumors regular

    Venderious

    Joined:
    Dec 15, 2014
    Location:
    Groningen
    #16
    Fingers crossed that it will be patched in the next release.
     
  16. SFeV macrumors newbie

    Joined:
    Sep 27, 2018
    #17
    I have the exact same login process on my 2017 MBP.
    Hope they will fix it!
     
  17. DeadeyeM macrumors regular

    Joined:
    Jun 12, 2012
  18. Smoothie macrumors 6502a

    Joined:
    Jun 23, 2007
    Location:
    California
    #19
    Same with FileVault on. It also behaves the same with or without dynamic desktop.

    But I had a more serious issue just now. My 2017 iMac wouldn't come out of sleep mode. It's never failed to do this in the year I've had it. I had to hold down the power button for awhile until it rebooted. There were no external drives attached and nothing has changed on this iMac other than installing Mojave.
     
  19. Tommy c macrumors 6502

    Tommy c

    Joined:
    Sep 9, 2012
    Location:
    Pocono PA
    #20
    Are we talking about when you turn on the computer, it has a blackish screen, then goes to boot mode with apple logo? Mine always started right up as soon as I hit the power button. Now it seems to go to this blackish screen then to the apple logo to boot up.
     
  20. josduc macrumors member

    Joined:
    Oct 8, 2010
  21. ericthered926 macrumors newbie

    ericthered926

    Joined:
    Jun 11, 2017
    #22
    Yeah, the black screen is ugly, and the wallpaper on the lock screen is slightly pixelated as well... these are all very minor issues, but they do make the OS feel less polished.
     
  22. BookEmDanno macrumors 6502

    BookEmDanno

    Joined:
    Nov 9, 2010
    Location:
    State of ~Aloha!~
    #23
    Same issue on my unsupported MacBookPro5,3. And I do not have Filevault on.
     
  23. Marcopolo53 macrumors regular

    Joined:
    Oct 21, 2016
    Location:
    Toronto
    #24
    Just upgraded to 10.14.1 and there were EFI ROM updates included for both machines. Now, from a cold boot, no longer getting the load, wink to black and back to loading process. Guessing Apple has fine tuned the macOS plus EFI ROM together has eliminated the wink issue.
    Nice job Apple
     
  24. StellarVixen macrumors 68000

    StellarVixen

    Joined:
    Mar 1, 2018
    Location:
    Earth
    #25
    It’s over! No more black screen on startup.
     

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26 September 28, 2018