Why can't I enter single user mode?

Discussion in 'Mac OS X Lion (10.7)' started by rev.b, Aug 22, 2011.

  1. macrumors regular

    rev.b

    Joined:
    May 1, 2009
    Location:
    Portugal
    #1
    As above.

    I tried several times holding cmd+s during start-up, and it just loads Lion as usual. I thought refit was the problem, so I uninstalled it and reblessed Macintosh HD with my startup disk.

    Any ideas how to enter single user mode? Thanks.
     
  2. macrumors regular

    Joined:
    Jul 1, 2010
    #2
    Do you have a firmware password configured? I found that this prevented me from getting to either safe mode or single user mode...

    Spidey!!!
     
  3. thread starter macrumors regular

    rev.b

    Joined:
    May 1, 2009
    Location:
    Portugal
    #3
    Good question. I guess I had it configured in Snow Leopard.
    How to disable it without a Lion startup DVD?
     
  4. macrumors member

    Joined:
    Jun 9, 2011
    #4
    Maybe you can boot from an older OS X?

    This might help.
     
  5. thread starter macrumors regular

    rev.b

    Joined:
    May 1, 2009
    Location:
    Portugal
    #5
    A little help here disabling firmware password.

    I booted Snow Leopard install disk and ran firmware password utility; unticked "Required password to start this computer from another source", applied and reboot; firmware password is still there.

    I tried to run the Open firmware password from http://support.apple.com/downloads/Open_Firmware_Password_1_0_2 , but it crashes on Lion.

    What am I doing wrong?
     
  6. macrumors member

    Joined:
    Jun 9, 2011
    #6
    Maybe you want to try changing the RAM configuration and resetting the PRAM as described here.
     
  7. thread starter macrumors regular

    rev.b

    Joined:
    May 1, 2009
    Location:
    Portugal
    #7
    Thanks, but I just solved it, maybe with the obvious solution.

    I booted from the recovery partition, ran the Firmware password utility, and it worked.

    Apparently, all previous versions don't work with Lion, even booting from the DVD...
     
  8. macrumors member

    Joined:
    Jan 9, 2003
    #8
    Same original problem -- can't enter single-user mode with command-S.
    Mid-2011 Mac Mini, came with Lion installed.
    Kinesis Ergo keyboard, which may be the problem, but it acts as a standard USB keyboard.

    I do _not_ have a firmware password configured.

    Any ideas how to get into single-user mode?

    (Why? I noticed that although I have 8GB of RAM installed in a 2011 Mini, sometimes the crash reports I get show only 4gb installed, so I want to run memtest in single-user mode for a while)
     
  9. macrumors member

    Joined:
    Mar 29, 2008
    #9
    Did you ever get a response?

    I have File Vault enabled. I start with CMD S pressed. It brings me to password screen. I enter the password, then ENTER, and then immediately CMD S again.

    Still the computer boots up fully. Not in Single User mode.

    Just how difficult can Mac make this stupid little step?

    Welcome any ideas. Thanks!
     

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