RE:
"I have a PowerPC G5 (IBM Processor) (1.1), Quad Core, 2.5 GHz, 6.5MB RAM. I am currently running MAC OS 10.4.11. I need to replace the hard drive and would like to move up to a newer OS. From what I read on-line Snow Lepoard will not run on a PowerPC without a major hack. I also looked at Lepoard, but I see postings about it running slow on a PowerPC G5. I am about to upgrade to Final Cut Pro 7 and outside of the OS this will be ablout all that will be on the machine. Any suggestions?"
Actually, MY suggestion is that you "stay where you are", OS-wise.
10.4.11 will probably run as fast as 10.5.x on the g5, and may use less memory, as well.
Even though the processor may have been made by "IBM", it's still a "PowerPC" CPU and cannot run 10.6 "Snow Leopard" in any way, shape, or form.
And, DON'T "replace" the hard drive. Just ADD a SECOND drive to the g5 tower - there's room for it, all you do is plug it in and initialize it.
You can use something like SuperDuper or CarbonCopyCloner to "clone" the contents of your older drive onto your newer one. Then you can keep the older drive around as a backup.
It is ALWAYS best to have a second hard drive right there, online, ready-to-go in an emergency.
Final thought: if you add a second drive, then you might consider trying out 10.5.x to see how it works for you. Again, leave the old drive in place and you can always "go back" if things aren't working out as expected....
- John