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waterijs

Q: "set default" give`s "bad default". How to create good default, where to change?

Hi community, anybody out there to explain simple how i can change the nvram default content, where is it located? In the hardware or on the disk? How can i repare a "bad default".

 

Any information would be highly appreciated.

 

iMac G4 2004

iMac

Posted on Sep 5, 2013 2:44 AM

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Q: "set default" give`s "bad default". How to create good default, where to change?

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  • by rccharles,

    rccharles rccharles Sep 5, 2013 10:14 AM in response to waterijs
    Level 6 (8,486 points)
    Classic Mac OS
    Sep 5, 2013 10:14 AM in response to waterijs

    Why do you want to change the nvram?

     

    What are you thinking of changing?

     

    Unless you know what you are doing, you best not mess with nvram.

     

    nvram allows you to access the firmware variables.  Messing up the nvram variables can mess up your machine.

     

    This command will list all your firmware variables

    sudo nvram -p 
  • by waterijs,

    waterijs waterijs Sep 6, 2013 3:25 AM in response to rccharles
    Level 1 (0 points)
    Sep 6, 2013 3:25 AM in response to rccharles

    Thank you for your reaction Charles. I want to reset my nvram because of startup problems. What i normaly do: start in open firmware, then reset-nvram, set-default, reset-all. Normally that wil work and helps to get mac ppc with problems going again. This one not and it give me an answer on the "set-default" > bad-default .

     

    How can i fix that bad default?

  • by rccharles,

    rccharles rccharles Sep 6, 2013 10:19 AM in response to waterijs
    Level 6 (8,486 points)
    Classic Mac OS
    Sep 6, 2013 10:19 AM in response to waterijs

    Perhaps you should replace the battery on your machine.  A bad battery can cause startup problems on some machines. 

     

    I have not seen this error message. I search on the Internet for this kind of stuff & do the magic with my fingers crossed. 

     

    Your title has set default, but the command is set-default

     

    You should get something like unknown command. You sure you didn't put an extra space in the command somewhere.  This isn't Unix. There is a set command if I recall correctly.  There are no spaces in set-defaults

     

    Here is what I post on this topic.  Try the other commands & see if they work.

     

    Sometimes if volumes don't appear in Startup Manager (what you get when you hold down the Option key at startup), you need to reset the Mac's PRAM, NVRAM, and Open Firmware. Shut down the Mac, then power it up, and before the screen lights up, quickly hold down the Command, Option, P, and R keys, until the Mac has chimed twice more after the powerup chime.

     

    Then, before the screen lights up, hold down Command-Option-O-F until the Open Firmware screen appears. Then enter these lines, pressing Return after each one:

     

    reset-nvram

    set-defaults

    reset-all

     

    "The reset-all command should restart your Mac. If so, you have successfully reset the Open Firmware settings."

    http://support.apple.com/kb/TS1812?viewlocale=en_US

     

    Should this fail...

    Try taking the battery out for 10 minutes.  Put battery back in.  Cross fingers. Power the machine back on.

     

    How to eject a cd from the internal cd drive:

    eject cd

     

    List of devices:

    devalias

     

    List of variables:

    printenv

     

    More than you ever wanted to know about open firmware

    http://www.firmworks.com/QuickRef.html

     

     

    ( nvram is the equivalent Mac OS X terminal command. )

    ---------------------

    Resetting your Mac's PRAM and NVRAM

    http://support.apple.com/kb/HT1379