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iMac Ruby G3 400 how to force boot from HDD?

429 Views 4 Replies Latest reply: Oct 25, 2012 10:47 AM by Rambling Joe RSS
T-west Calculating status...
Currently Being Moderated
Oct 25, 2012 8:55 AM

Friends, I am a novice with things apple. I took in a dormant 'Ruby' that had not run in a long time. Got her going, and updated firmware to 4.1.9f1.

Question: At the (OF) bash prompt is there a command to try to force it to boot from HD?


The system was working, I simply removed [very carefully] the HD in order to deal with an upgrade to a 60GB. The secondhand disc CD set would not boot so I reinstalled the original 10GB drive. on Power-On I simply get the ? indicator - not finding a bootable device/file. Drive is spinning, nothing physical has changed.


thank you for your help


iMac, iMac Ruby G3 400 Slot
  • Limnos Level 8 Level 8 (36,555 points)
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    Oct 25, 2012 9:05 AM (in response to T-west)

    Are you sure the cables are plugged in all the way?  The power cable could be in tight and that would cause it to spin when power is turned on, but if the data cable is loose it won't be read.  Normally if there is a valid system on any drive the Mac will eventually get to it and boot.

  • Rambling Joe Level 2 Level 2 (280 points)
    Currently Being Moderated
    Oct 25, 2012 9:10 AM (in response to T-west)

    Hold down the option key at start up.  This will bring up the Startup Manager.  Startup Manager should show your hard drive with the valid startup system.  Select the drive then click the right arrow key.


    After startup, go to system preferences and select the boot drive for your system.


    Since this was a dormant system, did you replace the PRAM battery?  It is probably this kind:



    You can probably find it also at your local Walmart, Walgreen's, CVS, etc. for around $5 (Radio Shack for around $20).


    Good luck.

  • Rambling Joe Level 2 Level 2 (280 points)
    Currently Being Moderated
    Oct 25, 2012 10:47 AM (in response to T-west)

    First, the second hand disk you have might not be compatible with your iMac.  Apple made hardware specific discs that shipped with each iMac, and those discs can't be switched between iMac models.  An example, the disks that came with the iMac model identifier Power,Mac2,2 (July 200 0 Feb. 2001) won't work on the similar but not the same iMac model identifier PowerMac2,1 (Oct. 1999 - July 2000), or vice versa.


    However, if you use a Retail Copy of the OS 9 or OS X (depending upon your needs), then it will work on all models compatible with that OS.


    As to your question, a dead PRAM battery can make it so it doesn't recognize the boot volume on the hard drive.


    Good luck.


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