Unable to start up in "Single User Mode."

I am on an Intel Mac Pro. I can't seem to start up in the Single User Mode.
I hold down the Command and S keys during startup, but always get to my regular screen, logged in to my account. I changed the login options from automatic to off, but the same thing still happens. Any help would be appreciated.

Have you possibly set yourself a firmware password? Further instructions here:

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    Hi, for a few weeks now my MacBook's been starting up in single-user mode by itself, without me touching anything. The thing is, it only happens about half the time - otherwise it's booting up normally. I wiped my drive and reinstalled Lion, ran fsck and used disk utility several times, but it's still happening.
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    My friend, you are onto something Turning my keyboard on *after* startup for the last week and it hasn't happened once! Any idea why it's doing that? Thanks!

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  • Powerbook -can't start up in single user mode or from CD-why?

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    Try this one for some information.

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    I solved this. I was able to boot up in verbose mode and note that a certain missing file '/etc/hostconfig' was mysteriously missing and causing an error at the boot-up. I was able to boot this mac up in Target Disk mode and copy the file into the /etc/ directory from a backup through another Mac and now it's working fine, thank G-d!
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  • MBP starts up in Single User Mode by default..

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    Ok, I did the dmesg command at the prompt. Here is word for word what it spit out:
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    hi mem tramps at 0xffe00000
    PRE enabled
    standard timeslicing quantum 10000 us
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    96 prelinked modules
    ACPI CA 20060421
    AppleIntelCPUPowerManagement: ready
    AppleACPICPU: ProcessorApicId=0 LocalApicId=0 Enabled
    AppleACPICPU: ProcessorApicId=1 LocalApicId=1 Enabled
    Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of The University of California. All Rights Reserved.
    using 10485 buffer headers and 4096 cluster IO buffer headers
    Enabling XMM register save/restore and SSE/SSE2 opcodes
    Started CPU 01
    IOAPIC: Version 0x20 Vectors 64:87
    ACPI: System State [S0 S3 S4 S5] (S3)
    Security auditing service present
    BSM Auditing Present
    rooting via boot-uuid from /chosen: 00001B5D-7D26-0000-2F5D-000090200000
    Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>
    USB caused wake event (EHCI)
    FireWire (OHCI) Lucent ID 5811 PCI now active, GUID 0016cbfffe523440; max speed s400.
    Got boot device =IOService:/AppleACPIPlatformExpert/[email protected]/AppleACPIPCI/[email protected],2/AppleAHCI/PRT [email protected]/[email protected]/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOBlockStorageDr iver/ST9100824AS Media/IOGUIDPartitionScheme/Customer02
    BSD root: disk0s2, major 14, minor 2
    CSRHIDTransitionDriver::start before command
    IOBluetoothHCIController::start Idle Timer Stopped
    disk0s2: 0xe0030005 (UNDEFINED).
    localhost:/ root#
    A couple of things to note:
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    2 File Vault is turned on. And let me tell you. If you ever use more than half your drive space, as most people do, you will have a humbling experience. File Vault is overkill. I am angry that Apple could not come up with a "fail-safe" for legitimate, password bearing rightful owners.
    I just want one chance to get in my home folder to get what I want (my music, photos, mail, passwords, widgets, etc.)

  • Can't start up in single user mode

    MacBook was shipped to me carelessly and now I can't get it to boot up. Tried just about everything, but wondering if there's any other way besides Apple + S to get it in Unix mode.

    Thought I should add that after a long wait, a grey folder with a question mark pops up. It's not flashing, just solid. And eventually that disappears and goes back to a white screen.

  • Unable to Access Single User Mode on Macbook Air 2012

    I am unable to enter SINGLE USER mode on myMacbook Air 2012....I have made sure that there is no Firmware Password preventing me from doing so...what else
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    So are you saying you try to start up as shown here:
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    If so, what happens when you try?  What do you see?

  • Powerbook won't start, got message i don't understand in single-user mode

    PowerBook G4 Mac OS X (10.3.9)
    About a week ago my powerbook (purchased in Dec '03, running 10.3.9) froze while I was using it. I had to manually shut it off, and then it would not restart (got stuck on grey screen with gear). I was able to start it up again once in Safe Mode, at which point I downloaded and ran Macaroni. Upon reboot, it wouldn't start up at all, staying on the grey screen for 15-20 minutes before I gave up. Now, I've tried starting it in Single-user mode. At the command I typed "fsck -fy" and the following message was returned:
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    The two observations may be related. It is possible that the power adapter has developed a fray or short, and is giving insufficient power for the hard drive to operate properly. Do you have another Mac you can connect the machine to via Target Disk Mode after getting a replacement power adapter?
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  • Start SQL Server in single user mode with parameter -m doesn't work well

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    select @@servername;
    (1 rows affected)
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    below the original doc on msdn:
    Start SQL Server in Single-User Mode
    Provide Feedback
    Under certain circumstances, you may have to start an instance of SQL Server
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    damaged master database or other system database. Both actions require starting
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    Starting SQL Server in single-user mode enables any member of the computer's
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    When you start an instance of SQL Server in single-user mode, SQL Server
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    single connection and that connection must identify itself as the
    sqlcmd client program. Use this option when you are starting
    SQL Server in single-user mode and an unknown client application is taking the
    only available connection. To connect through the Query Editor in Management
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    Hi Shawn Xiao,
    For starting SQL Server instance in single user mode, we can add –m; parameter in SQL Server Configuration Manager, also we can run CMD with ‘Run as administrator’ and input the following statement.
    I do a test in SQL Server 2014 Express version, after starting SQL with Single User Mode, SQL Server will only accept one connection. If you connect to SQL Server with a user account, the following error will occur.
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    However, in your situation, you can connect to SQL Server and run T-SQL statement successfully, it can be due to connection with the administrator account in your sqlcmd.
    For more information, you can review the following article.
    Sofiya Li
    Sofiya Li
    TechNet Community Support

  • Can't enter Single-User Mode

    I just bought tiger for my 12 inch powerbook G4. am unable to complete installation due to an error with my 10.2. The problem is I dont have the start up disks anymore and can't enter single-use or verbose-mode to fix the problem.
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    An Open Firmware password is one thing that would prevent you from changing the startup disk, booting from a CD or starting up in single user mode. You would see a lock and a dialog asking you to enter your password. So, it doesn't seem that this is your problem.
    If you have some file directory damage, you can use the Tiger install DVD to attempt to repair it. Put the DVD in the drive, restart and hold down on the "c" key (if you have one and then choose the language you want to use. At the next screen, do not continue to install but choose to open the Disk Utility from the Utilities menu. You can then use the Disk Utility to "repair disk" on your hard drive. The Tiger Disk Utility is pretty mature and can repair many problems.

  • How do i repair my hard drive in single user mode when disk is full?

    Hi there Apple Community!
    I have an old Macbook Pro 17" with an upgraded 500GB harddrive and 4GB memory. I'm running Mac OSX Lion.
    Was hoping you could help me out.  THis is the situation:
    Long story short I spilt wine on my macbook and the screen went a bit blobby. Switched it off for a few days, removed the battery etc. etc. Opened it up cleaned out as much of the wine as possible, but unfortunately some of it came in behind the LCD, so now the screen has a nice red stain.  Obviously I'm not going to try to clean that out of the LCD. 
    My Macbook Pro still worked for a few days after that, but then my harddrive gave up.  I booted in the Recovery HD menu, verified the drive and I got the error "Keys out of order - This disk needs to be repaired, click Repair Disk." I attempted to repair the disk but got the error "Keys out of order - Disk Full Error - The volume could not be repaired".
    Unfortnately of this 500GB I only have about 7GB free on it, as I have a huge iPhoto and iTunes library. I did make a TIme Machine backup of my user directory, but not the system files.  I don't really want to do a clean install because:
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    2) I don't want to have to download the whole Mac OSX Lion again. I should have made a USB bootable backup when I had the chance.  I don't have access to a broadband connection.
    What I feel are my viable options, are as follows:
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    2) Start up in Single User Mode and delete some unnecessary files and re-attempt to run the fschk -fy utility again (I tried this earlier and got the same Disk Full Error).  - the problem with this is, I'm not familiar with the command line and have no clue how to delete files.  I don't know my way around Unix.
    3) I can also probably attempt to make a Ghost Image or Acronis Image of the failed drive to this new drive, but not sure if Norton Ghost or Acronis True Image will be able to read this HFS drive - I believe it's possible as it's a simple hard drive clone. 
    If you can guide me in the best option - probably there is a better solution than my proposed ones above, I appreciate any feedback and comments you might have!

    hi Baltwo,
    So I ended up copying my user folder to another harddrive. I managed to download the whole osx lion again, reinstalled, and recovered my home folder using this discussion:
    I have managed to get all my files back. My iTunes library works fine, but my iPhoto library when I open it, get the following error:
    iPhoto cannot be opened because of a problem.
    Here's the error log
    Process:         iPhoto [1540]
    Path:            /Applications/iPhoto.app/Contents/MacOS/iPhoto
    Identifier:      com.apple.iPhoto
    Version:         8.1.2 (8.1.2)
    Build Info:      iPhotoProject-4240000~8
    Code Type:       X86 (Native)
    Parent Process:  launchd [209]
    Date/Time:       2012-09-19 19:56:45.528 +0200
    OS Version:      Mac OS X 10.7.4 (11E53)
    Report Version:  9
    Sleep/Wake UUID: 7948ABE2-5294-4F87-B6E3-777095A2F2EE
    Interval Since Last Report:          4780 sec
    Crashes Since Last Report:           9
    Per-App Crashes Since Last Report:   9
    Anonymous UUID:                      70117D38-03EA-4F9C-B810-50B743864B9E
    Crashed Thread:  0
    Exception Type:  EXC_BREAKPOINT (SIGTRAP)
    Exception Codes: 0x0000000000000002, 0x0000000000000000
    Application Specific Information:
    dyld: launch, loading dependent libraries
    Dyld Error Message:
      Library not loaded: /System/Library/PrivateFrameworks/iLifeSlideshow.framework/Versions/A/iLifeSlid eshow
      Referenced from: /Applications/iPhoto.app/Contents/MacOS/iPhoto
      Reason: image not found
    I've done an Apple Software Update but it didn't find an update for iPhoto.
    One thing to note is, this library was originally created on iLife 08, upgraded to '09 and it stayed on that version. It hasn't een upgraded to iLife '11.  It worked fine on my previous install of OSX Lion.  How do I recover the library without upgrading to '11 ?

  • Single-user mode freeze

    I am trying fsck a mac mini.
    When I start up in single-user mode, the keyboard(Bluetooth and usb) do not work. I have to unplug the cpu.
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  • Single User Mode: Searching for root...

    My 2 year old unplugged my PowerMac iMac G5 (single) and now it won't start up.
    I was finally able to boot up off of Disk Warrior and replace the directory, but it won't start up past the gray Apple screen. The fan comes on after about 45 seconds and blows hard. Then, I get the circle with a line through it, in gray. I've never seen that on a mac.. the international "no" sign.
    When trying to start up in Single User Mode, I get a long list of stuff either disabled, not found, missing etc and then it starts writing to the screen every 30 seconds a line like:
    Still searching for root.
    I've tried pulling the back off, resetting the SMU, starting up in Safe Mode, etc.
    This has happened with storms before and I can usually get it back.
    I don't have original install discs.

    When you say you have "OSX" but not the "original install disks" do you mean the mac originally came with an earlier version and you don't have those disks, but you have a retail copy of Tiger?
    The circle with the slash means that Open Firmware cannot find BootX. Basically, I think this means that Open Firmware recognises the startup volume as such but cannot hand control to the operating system at all. BootX is what it uses to get the operating system going. Without this, as you've seen, you cannot make even single-user mode.
    What is SMU?
    *Is your data backed up? If not, prioritise that unless you can afford to loose it.*
    Does DiskWarrior repair permissions? If not and you have the Tiger retail version, try running Disk Utility to do that. I don't think this will help, but it won't hurt.
    Do you have another Mac? If so and you have the retail Tiger, you might be able to use Pacifist to replace BootX (in /System/Library/CoreServices). Alternatively, if the other Mac is running the same version of the OS and is also a PPC Mac, you could try copying the file from that machine.
    Before you do any of this (with the exception of the permissions repair), try to backup any data you need if that's at all possible.
    - cfr

  • Can I mount a firewire device in single user mode?

    I've still got this idea I can rescue data from a hard drive that won't mount.
    I put my external backup drive on another iMac to simulate what would happen. Briefly,
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    I turn it back on again. It does not show up in /dev

    How far did you go under "single user" mode? In "Tiger", running 'sh /etc/rc' (instructions to use this are included among the messages displayed starting up in single-user mode) starts up all sorts of things. Perhaps plugging in the drive after the script has run will have it show up in '/dev/' (I haven't tested this)...

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