mandy1973

Q: HELP! Black screen after startup after Yosemite installation

Urgent help please.

I Have a late 2010 MacBook Pro and today installed Yosemite. It appeared to install ok, but now on startup it gets past the apple logo screen then just goes to a black screen with a cursor. I have attempted a safe boot, and it manages to get to the login screen, but it won't accept my password, it just keeps on loading the login screen over and over. Would love an answer please...I am completely puzzled!

MacBook Pro, OS X Mavericks (10.9.5)

Posted on Oct 19, 2014 4:20 AM

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Q: HELP! Black screen after startup after Yosemite installation

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  • by jpgeo,

    jpgeo jpgeo Nov 27, 2014 8:04 AM in response to engiadina
    Level 1 (0 points)
    Nov 27, 2014 8:04 AM in response to engiadina

    ok, so i had this problem back in 10.9 (blank screens on boot; PLUS, also, random blank screens on both at once, and no chance to wake up and continue), and now they just reappeared in yosemite 10.10.1. Mac Pro mid 2010, ATI radeon H5870 connected to a 30" Cinema HD, as well as a philips cheapo monitor with adapter. had to force shutdown...a simple parameter ram reset did NOT work; had to disconnect the philips monitor before the problem went away...seems we have regressed since the 10.10.0 to 10.10.0 update.  If someone can recommend a fix, that is greatly appreciated-i really miss the second monitor.

  • by rminns,

    rminns rminns Nov 30, 2014 8:16 PM in response to abstert
    Level 1 (0 points)
    Nov 30, 2014 8:16 PM in response to abstert

    Awesome job here Abstert.  You saved a night of frustration.  

  • by Kemal-abi,

    Kemal-abi Kemal-abi Dec 3, 2014 11:23 AM in response to mandy1973
    Level 1 (0 points)
    Dec 3, 2014 11:23 AM in response to mandy1973

    guys i have the same problem:

     

    macbook pro mid 2012

    13 inch

    after update to 10.10.1 my screen went black.

    if i put a flashlight to the screen i can see everything.

    the backlight doesn't work at all.

     

    i don't think this is a coincidence. this has something to do with the update.

    i went to a apple store and told them about the problem and asked for advice.

    they said : " the backlight must be broken, you must replaced it and it costs about €400.-.."

    i have tried several solutions what i could find on the internet but none work.

     

    2 or 3 reset tricks.

    swapping and installing to another hdd.

    swapping memory.

     

    please some one help me..

  • by a.c.hansonjr,

    a.c.hansonjr a.c.hansonjr Dec 4, 2014 5:47 AM in response to abstert
    Level 1 (0 points)
    Dec 4, 2014 5:47 AM in response to abstert

    Thank you very much.

     

    I never knew about the single user boot command so it's double thanks!

     

    It wasn't until I deleted the /private/var/.AppleUpgrade file that I was actually able to boot. Just deleting the loginwindow plist didn't work for me.

     

    For those trying these instructions, you may not have a /Library/Preferences/loginwindow.plist file as mine did not.

     

    Thanks again!

  • by dmtrhts,

    dmtrhts dmtrhts Dec 6, 2014 6:54 AM in response to abstert
    Level 1 (0 points)
    Dec 6, 2014 6:54 AM in response to abstert

    Thank you abstert. Your suggestion got me one step further, now I get login screen instead of black screen, but I cannot pass this login screen. The password is correct. But it simply reloads the login screen after spinning the wheel.

     

    Do you have any further suggestions?

  • by jimmantione,

    jimmantione jimmantione Dec 6, 2014 7:44 AM in response to dmtrhts
    Level 1 (0 points)
    Dec 6, 2014 7:44 AM in response to dmtrhts

    I get a black screen on boot up on my macbook pro mid 2012, and no curser showing either.  Computer is running,hard drive is booting up, key board lights are on, but screen is black. I wait a few minutes for it to go to sleep.  Once i awake it from sleep the log on screen appears.  This has been happening for about 3 days which is when i installed the yosemite update 10.10.1.  Not sure if its related or not.

  • by Kemal-abi,

    Kemal-abi Kemal-abi Dec 6, 2014 9:19 AM in response to jimmantione
    Level 1 (0 points)
    Dec 6, 2014 9:19 AM in response to jimmantione

    I Have exactly the same problem.. The backlight doesn't work.. Right after update 10.10.1

    i don't accept that this is random.. It has got to do something with the update.

    i am starting to loose my faith in apple devices and customer support.

  • by aminasadi,

    aminasadi aminasadi Dec 8, 2014 6:31 AM in response to mandy1973
    Level 1 (0 points)
    Dec 8, 2014 6:31 AM in response to mandy1973

    Try this, seemed to work for me:

     

    use 'pmset -g' to see the 'before' values in case you want to get back to them.


    Then set these values to zero:


    sudo pmset -a standby 0
    sudo pmset -a autopoweroff 0
    sudo pmset -a hibernatemode 0

  • by Zeerakfromlahore,

    Zeerakfromlahore Zeerakfromlahore Dec 13, 2014 9:49 AM in response to abstert
    Level 1 (0 points)
    Dec 13, 2014 9:49 AM in response to abstert

    Thank you ABSTERT

     

    It worked fine for me

     

    You are the best

  • by abstert,

    abstert abstert Dec 15, 2014 2:40 PM in response to Kemal-abi
    Level 1 (5 points)
    Dec 15, 2014 2:40 PM in response to Kemal-abi

    Yes you are right...this is not random.

     

    The update fails to remove/update the login.plist file which is why the fix is to remove it.

  • by abstert,

    abstert abstert Dec 15, 2014 2:41 PM in response to mandy1973
    Level 1 (5 points)
    Dec 15, 2014 2:41 PM in response to mandy1973

    I'm just wondering when my update will be the one that solved the problem.

  • by naanwar,

    naanwar naanwar Dec 17, 2014 10:28 PM in response to abstert
    Level 1 (0 points)
    Dec 17, 2014 10:28 PM in response to abstert

    Boot to single user mode (hold S while powering on the Mac)

     

    Type and hit return: /sbin/fsck -fy - When I execute this, I get multiple

    Missing thread record (id = ######) and bunch of other stuff. The messages don't sound good.

    Invalid volume directory count

    Invalid volume file count

    Incorrect number of extended attributes

    Incorrect number of Access Control Lists

    Overlapped extent allocation (id = #####) multiple ide numbers

     

    Type and hit return: /sbin/mount -uw /

     

    Type and hit return: rm /Library/Preferences/com.apple.loginwindow.plist

    Type and hit return: rm /Library/Preferences/loginwindow.plist

    Type and hit return: rm /private/var/db/.AppleUpgrade

     

    FOR ABOVE THREE I GET FILE NOT FOUND.

     

    Type and hit return: reboot

     

    On reboot, I get the same black screen.

     

    What else can I try?

  • by Greg Schremp,

    Greg Schremp Greg Schremp Dec 23, 2014 7:46 AM in response to abstert
    Level 1 (0 points)
    Dec 23, 2014 7:46 AM in response to abstert

    Worked great..thank you!

  • by abstert,

    abstert abstert Dec 24, 2014 11:10 PM in response to naanwar
    Level 1 (5 points)
    Dec 24, 2014 11:10 PM in response to naanwar

    naanwar wrote:

     

    Boot to single user mode (hold S while powering on the Mac)

     

    Type and hit return: /sbin/fsck -fy - When I execute this, I get multiple

    Missing thread record (id = ######) and bunch of other stuff. The messages don't sound good.

    Invalid volume directory count

    Invalid volume file count

    Incorrect number of extended attributes

    Incorrect number of Access Control Lists

    Overlapped extent allocation (id = #####) multiple ide numbers

     

    Type and hit return: /sbin/mount -uw /

     

    Type and hit return: rm /Library/Preferences/com.apple.loginwindow.plist

    Type and hit return: rm /Library/Preferences/loginwindow.plist

    Type and hit return: rm /private/var/db/.AppleUpgrade

     

    FOR ABOVE THREE I GET FILE NOT FOUND.

     

    Type and hit return: reboot

     

    On reboot, I get the same black screen.

     

    What else can I try?

    Hello Naanwar,

     

    This error means that your hard drive is failing and you should backup your data before it is all lost.  I would purchase a replacement drive and begin migrating your data over.

     

    For the "rm /Library/Preferences/com.apple.loginwindow.plist" you should get no response as that file should exist and have been deleted.  Can you confirm?

  • by Jersey.Shore,

    Jersey.Shore Jersey.Shore Dec 29, 2014 6:49 AM in response to nvnran
    Level 1 (0 points)
    Dec 29, 2014 6:49 AM in response to nvnran

    I have an Early 2008 MacBook Pro also.  When I installed Yosemite it booted as far as showing my wallpaper image without the Dock, Mouse, or Apple bar up top (Apple bar was black).

     

    After two days of boot variations, I found that my display has four (4) "internal" displays (enough pixels for Retina on a Non-Retina MacBook).  I tried to get the display to boot with mirroring on (so the four internal displays would be the same) with no luck.

     

    In the end, I boot, and can't see any controls until i short-cut mirroring on: CRTL + F1.  Then all the screen elements appear.

     

    How I discovered the issue was random: I moved the mouse unseen to the fourth right-most screen (actual) in frustration.  Then I could click the black apple bar area and it appears, launch System Preferences > Display, then Gather, select the main display dialog (four internal display dialogs appear), click arrange, then mirror!

     

    Good Luck!

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