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The G3 can't boot from Leopard, but may start to boot. It's likely just another difference with the boot rom on older Macs, compared to (slightly) newer Macs. I'm not sure if the firmware will show the "prohibited sign" icon, or it just shows a kernel panic, or maybe just stops booting, and does nothing visible. I don't have one now to see what response it would normally show.
The 16GB sticks shouldn't make any difference, but 8GB is a better 'fit'. Any OS X will fit within 8GB (so far)
I THINK you could use the G3 iBook to make the flash drive installer, but I never tried building a Leopard installer, using a G3 running Jaguar. As you say, it will take quite a long time to do it with USB 1.1, but if all else fails, it would be worth the try, I suppose.
OK so the school did allow me to use computers to make the drive, APM and everything, and *still* no luck. I managed to get it into verbose mode, here's the screen:
wlGxGBN.jpg

Have I not correctly used open firmware or something?
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The G3 can't boot from Leopard, but may start to boot. It's likely just another difference with the boot rom on older Macs, compared to (slightly) newer Macs. I'm not sure if the firmware will show the "prohibited sign" icon, or it just shows a kernel panic, or maybe just stops booting, and does nothing visible. I don't have one now to see what response it would normally show.
The 16GB sticks shouldn't make any difference, but 8GB is a better 'fit'. Any OS X will fit within 8GB (so far)
I THINK you could use the G3 iBook to make the flash drive installer, but I never tried building a Leopard installer, using a G3 running Jaguar. As you say, it will take quite a long time to do it with USB 1.1, but if all else fails, it would be worth the try, I suppose.
OK so the school did allow me to use computers to make the drive, APM and everything, and *still* no luck. I managed to get it into verbose mode, here's the screen:
wlGxGBN.jpg

Have I not correctly used open firmware or something?
 
Looks like a kernel panic because of some extra (non-booting) partitions on your flash drive.
You would want to try to make the boot partition again.
Use Disk Utility to create only one partition. You can do that in the partition tab by choosing the partition drop down, where you have choice to make multiple partitions. Select One Partition, then click the Apply button. That may take care of your partition issue.
Or, maybe your 16GB flash drive just won't tolerate the re-partition. In my experience, each time a USB flash drive is fully erased, it gets slower and slower, until copying files to the device get unbearably slow. Some flash drives do have a better life than others. Maybe the one that you have tried just is not in very good condition now.
That's a reason that I recommend making an OS X installer on a brand new flash drive, if possible.
 
Looks like a kernel panic because of some extra (non-booting) partitions on your flash drive.
You would want to try to make the boot partition again.
Use Disk Utility to create only one partition. You can do that in the partition tab by choosing the partition drop down, where you have choice to make multiple partitions. Select One Partition, then click the Apply button. That may take care of your partition issue.
Or, maybe your 16GB flash drive just won't tolerate the re-partition. In my experience, each time a USB flash drive is fully erased, it gets slower and slower, until copying files to the device get unbearably slow. Some flash drives do have a better life than others. Maybe the one that you have tried just is not in very good condition now.
That's a reason that I recommend making an OS X installer on a brand new flash drive, if possible.
There is only one partition on it. I made sure of it.
Should I try putting the old HDD in an enclosure and booting from that? I also made a DMG image of it using Carbon Copy Cloner, if I get a 64 GB stick, could I restore that image to it using TransMac?
It also gives this sign when pull the drive out of the computer when the Apple logo shows up?
 
Did you format the SSD BEFORE you installed it in your iBook?
Maybe there is a firmware issue with that, not allowing boot at all.
THAT may need a correct-for-Mac format, probably in an external case so you can try other options.

Do you have access to a firewire external of some kind? That would make several things a lot simpler, such as making a bootable installer, and setting up a Leopard bootable partition for testing, without having to think about mis-typing an open firmware boot command - It's just a suspicion that you may simply have problems with booting, and a Firewire device will possibly help you.

What SSD are you trying to use, anyway?
 
There is only one partition on it. I made sure of it.
Should I try putting the old HDD in an enclosure and booting from that? I also made a DMG image of it using Carbon Copy Cloner, if I get a 64 GB stick, could I restore that image to it using TransMac?
It also gives this sign when pull the drive out of the computer when the Apple logo shows up?
Did you format the SSD BEFORE you installed it in your iBook?
Maybe there is a firmware issue with that, not allowing boot at all.
THAT may need a correct-for-Mac format, probably in an external case so you can try other options.

Do you have access to a firewire external of some kind? That would make several things a lot simpler, such as making a bootable installer, and setting up a Leopard bootable partition for testing, without having to think about mis-typing an open firmware boot command - It's just a suspicion that you may simply have problems with booting, and a Firewire device will possibly help you.

What SSD are you trying to use, anyway?
The SSD in question is a KingSpec 128gb mSATA SSD with a 44 pin IDE adapter for it. But like you said earlier, the hard drive shouldn't affect OS X booting. Also, I know my Mac sees the SSD, as both /ata-6@d and /ata-3@20000 have /disk listed under them using dev / ls . I also have no FireWire devices of any kind whatsoever. I did not format the SSD, and I doubt it would have made much difference either. Should I use some other system like Linux to format the drive, and then possibly copy the image file to a partition to boot from. I may see if I can get an enclosure for FireWire this weekend, but now I need to work with what I have.
 
You actually do have a firewire device - your G3 iBook. Or, any other Mac with a Firewire port.
You can make a partition on the G3's hard drive, restore the installer to that partition, connect the G3 to the G4 with a Firewire cable, then boot the G3 to Target Disk mode (Boot while holding the T key) which will then show a floating Firewire icon on the G3 screen. You can Option boot the iBook G4, which will show the installer as a choice to boot.

But, doesn't help you too much unless you have a Firewire cable laying around somewhere.
 
You actually do have a firewire device - your G3 iBook. Or, any other Mac with a Firewire port.
You can make a partition on the G3's hard drive, restore the installer to that partition, connect the G3 to the G4 with a Firewire cable, then boot the G3 to Target Disk mode (Boot while holding the T key) which will then show a floating Firewire icon on the G3 screen. You can Option boot the iBook G4, which will show the installer as a choice to boot.

But, doesn't help you too much unless you have a Firewire cable laying around somewhere.
Well, I can definitely purchase a FireWire cable, but the problem is my G3's HDD is currently split between OS 9 and Jaguar, on 10 GB partitions each. Could I use the USB stick I made with it? Surely if the G3 will start from it, it can certainly use it for target disk mode?
 
You would STILL have the same situation, which is correctly typing the open firmware command to boot the G4 from USB. I'm not even sure that you will be able to see the USB drive on the G3, when trying to boot the G4 through target disk mode, or if the open firmware command would even work when the USB stick is connected to another computer, in turn connected through firewire. The idea is to copy the Leopard installer to the G3 internal hard drive, which would work, but it would mean moving your present OS X system off, re-partitioning to allow the storage for the Leopard installer, doing the install from target disk mode, then restoring your normal boot system to the G3.
I did say that you **could** do that (and it would work). I didn't say that you would WANT to do it. It could be a little "messy" for you, and seems like it won't be practical for you to do.
 
You would STILL have the same situation, which is correctly typing the open firmware command to boot the G4 from USB. I'm not even sure that you will be able to see the USB drive on the G3, when trying to boot the G4 through target disk mode, or if the open firmware command would even work when the USB stick is connected to another computer, in turn connected through firewire. The idea is to copy the Leopard installer to the G3 internal hard drive, which would work, but it would mean moving your present OS X system off, re-partitioning to allow the storage for the Leopard installer, doing the install from target disk mode, then restoring your normal boot system to the G3.
I did say that you **could** do that (and it would work). I didn't say that you would WANT to do it. It could be a little "messy" for you, and seems like it won't be practical for you to do.
I could probably remove the OS 9 partition to the flash drive, I've used less than a GB on it, and then use that partition for it. But I also have a 10.4.3 DVD, could I use target disk on the G3's DVD drive?
 
Well, sadly I wont even have access to the G4 until Monday... guess I'll give it a rest until then. But, tomorrow, I will pick up a Firewire 400 cable. And it is a bootable disc, there is things like mach_kernel on the root directory. I will update this post with the results. 10.4.3 came after my model of Mac was introduced, so it should have the necessary files for it.
 
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