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"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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3 replies

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?

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. )

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Resetting your Mac's PRAM and NVRAM

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

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

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