I have a tower Mac Pro with Snow Leopard running on it.
Unfortunately one of the software that I use doesn't have yet a Snow Leopard update. So I am thinking maybe I can install older version of Leopard on one of the internal drives (i have 3 additional internal drives), so I can boot my computer from either Leopard or Snow Leopard, depending on needs (i don't want to get rid of Snow Leopard).
Is it possible to have them both on MacPro and what is the best approach?
Just did the same thing today. I tried to roll back my MacPro which came with 10.6. My Leopard disk was 10.5 which wouldn\'t load on the hardware of the new Mac Pro. So I took an internal drive to an older G5 and loaded the 10.5 disk and then updated to 10.8. Put the drive back in the Mac Pro and booted into 10.8. Will start loading needed programs back in tomorrow.