Update Mac OS 8.5.1 to OS 9.1

I have an older iMac with 64 MB RAM and about 3GB hard drive space left. It is running OS 8.5.1. I just bought a new airport and a new iMac running OS 9.1. Apple tech help tells me that I must be running OS 8.6 or later for them to be able to share files through the airport. I tried to do a clean install of a new system folder using the CD that came with my new iMac on the old one, but it told me that I needed to update the firmware first. It said to look in the CD Extras folder, but I couldn't find anything in there that mentioned firmware updating. How can I upgrade the system? Is this an insidious plot by Apple to drive me mad? Please help! And could you make it simple, please? I'm kind of technologically challenged.
cbrummelAsked:
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weedConnect With a Mentor Commented:
The other place you can find it is http://www.info.apple.com/support/downloads.html which is what versiontracker links to. You want the iMac Firmware update 1.2.
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weedCommented:
Get the firmware update from www.versiontracker.com. Its very simple to run, just double click and follow the directions.
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weedCommented:
Answer is as above.
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cbrummelAuthor Commented:
I visited Version Tracker and did a search for firmware, but I couldn't find one that I thought applied to me. There was one for slot-loading iMacs, but mine is a sled, I don't have DVD-ROM, I don't have SCSI,and I didn't think that the modem update was the right thing. If I could find the right firmware update, this would be the perfect answer.
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radeCommented:
if your running OS 9.1 on the machine needing the firmware update just use the sw update control panel.  it will/should download the firmware update for you.
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weedCommented:
He cant get 9.1 installed until he updates the firmware.
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dandre2Commented:
cbRummel, what version of the OS are you trying to update to ?  8.6 or a later version ?
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weedCommented:
He states 9.1 in the question.
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