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| Author | Boot 7.6 on 9600? (Not 7.6.1) (Read 15597 times) | ||||||||||||||||||||||||||
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Tudor
1 MB  Posts: 1 
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on: December 18, 2006, 08:46
Is it possible to boot a PowerMac 9600/350 MHz using a Mac OS 7.6 disk? I've heard they can boot from a 7.6.1 CD, but not 7.6. Is this true? |
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mitchlynn91
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8 MB Posts: 8
Reply #1 on: December 18, 2006, 14:08
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Yes, true. Apple was doing as it had done previously in allowing all machines being Pre-G3 to operate and be backwards compatable. However by now ALL Mac's were shipping with System 8, so they limited the backward compatability of this as well as the 8600 to System 7.6.1 so that should the user want to operate System 7 they would have to purchase a copy from Apple.
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wove
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1024 MB Posts: 1363
Reply #2 on: December 18, 2006, 18:58
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Quote from: "Tudor" Is it possible to boot a PowerMac 9600/350 MHz using a Mac OS 7.6 disk? I've heard they can boot from a 7.6.1 CD, but not 7.6. Is this true? My 8600/300 came with a 7.6.1 install/restore CD which it will start from and install from. It will not start from or install from either a 7.6 or 7.6.1 generic installer CD. The 9600/350 suffered from production problems and Apple actually did not ship any of those units, until after they had announced they were discontinued. Apple list 7.6.1 as the mininum OS for these machines, but I have read that in point of fact all of the 9600/350 did ship with OS 8 installed. As an oddity, if you pull the heat sink off the Mach V machines (8600/250/300 and 9600/300/350) you will see the CPU is identified as an IBM PPC 760. The G3 CPU is a 750 and the CPU for the Mach V machines only differs from the G3 CPU in the L1 cache specifications. bill
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Old Mac Geezer
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64 MB Posts: 112
Reply #3 on: February 16, 2007, 14:46
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Quote from: "wove"
I had read that the 8600/9600 CPU cards were unique and not swappable with other machines. If the CPU in the 8600/9600 is more like a G3 than a 604e, then is it possible that you might get away with running Tiger on one, unmodified apart from meeting RAM and hard drive requirements, even though G3 is the minimum processor supported??
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wove
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1024 MB Posts: 1363
Reply #4 on: February 17, 2007, 03:03
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Quote from: "Old Mac Geezer" I had read that the 8600/9600 CPU cards were unique and not swappable with other machines. If the CPU in the 8600/9600 is more like a G3 than a 604e, then is it possible that you might get away with running Tiger on one, unmodified apart from meeting RAM and hard drive requirements, even though G3 is the minimum processor supported?? The last of the 8600 and 9600 machines are often referred to as MachV machines. They use an unique processor card and mother board. Using XPostFacto it is possible to install OS X version 10.0, 10.1 and 10.2 on machines using a 604 processors. While many move in this direction, support for doing so is not part of the System7Today focus and support for installing OS X on old world machines is not supported here. The Mach V machines are somewhat unique machines. They are the last of the pre-G3 architecture and are the fastest stock hardware that will run OS 7.6.1. Personally I would not upgrade my MachV 8600 with its 350MHz 604ev processor to either a G3 processor nor set it up to run OS X. It is an incredibly fast and productive machine just as it is:) bill
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Old Mac Geezer
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64 MB Posts: 112
Reply #5 on: April 21, 2007, 02:59
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What checks does the installer do to see if the machine can boot?? Does it check the gestalt ID of the machine from a list on the disc? Might it be possible to burn a copy of the 7.6 CD with the gestalt ID from the 8600/9600 added to the list??
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wove
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1024 MB Posts: 1363
Reply #6 on: April 21, 2007, 04:39
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Over the years a variety of tricks have been used to have Macs startup using "unsupported" systems. And it is perhaps worth giving it a try. Often newer hardware designs require system resources that are not available in older Systems The Mach V Macs had both a new mother board design and a new processor design which might require resources which were unavailable to systems older than 7.6.1. bill
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