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How to add OS9 back to a G4 450DP (run both OS9 and OSX)
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Fresh-Faced Recruit
Join Date: Dec 2006
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Offline
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Hi,
I have a G4 450DP AGC. It now has 10.3, which is great. I want to add OS9 as well so that I can boot up in either system. I purchased OS9 from Apple years ago, so I have the correct software.
Question: How do I install OS9 back? When I insert the OS9 install CD, will it know where to install it as far as creating a new folder on the hard drive? I don't want to overwrite 10.3.
Basically, I want to be able to click on OS9 or OSX for the startup disk on a restart.
I searched for this question, but could not find the answer.
thanks for the help and tips,
jack
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Senior User
Join Date: Dec 2001
Location: Land of Enchantment
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You can simply install OS 9 on your disk, and do two things, either run it in 'classic' mode, which means you're running OS X and 9 just runs in emulation mode, or you can boot in either system using the function 'Startup Disk' in OS9's Control Panels and OSXs System Preferences. Or you could partition your HD in two and install each on its own partition. If you do this you can choose the startup system holding the option key on reboot. To run classic go to System Preferences and open the classic functions under 'system'.
(Last edited by jmiddel; Dec 15, 2006 at 03:28 PM.
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Mac Elite
Join Date: Jan 2000
Location: Columbus, OH
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Originally Posted by jmiddel 
You can simply install OS 9 on your disk, and do two things, either run it in 'classic' mode, which means you're running OS X and 9 just runs in emulation mode, . . .
Classic is not an emulation. It's exactly the same as OS 9 booted standalone. The only major difference is that access to hardware is restricted due to the UNIX underpinnings. But for most programs, they run the same but slightly slower. Now that we have Intel processors, the speed hit is negligible.
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HyperNova Software, LLC
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Clinically Insane
Join Date: Oct 2001
Location: San Diego, CA, USA
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Originally Posted by msuper69
Classic is not an emulation. It's exactly the same as OS 9 booted standalone. The only major difference is that access to hardware is restricted due to the UNIX underpinnings. But for most programs, they run the same but slightly slower. Now that we have Intel processors, the speed hit is negligible.
Intel processors can't run Classic. It would have to run in emulation and, as you say, Classic doesn't do emulation. Classic apps on an Intel Mac just show a "no" sign (circle with a slash through it) and won't launch.
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Chuck
___
"Instead of either 'multi-talented' or 'multitalented' use 'bisexual'."
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Mac Elite
Join Date: Jun 2000
Location: If I tellz ya, then I gotsta killz ya !
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Originally Posted by msuper69
Now that we have Intel processors, the speed hit is negligible.
And what exactly does this have to do with the OP's G4/450 ?, since
there is NO classic mode on intel machines anyways 
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