I was trying to creat a bootable system on an external Firewire drive. My Lion-installed iMac will not boot from the Leopard distribution DVD. An iMac G5 system boots from the Leopard DVD.
iMac, Mac OS X (10.7.2)
If that new iMac came with Lion, it most likely won't boot with the SL install disc because the DVD is missing components required to boot it. See Computer-specific Mac OS X releases and Don't install a version of Mac OS X earlier than what came with your Mac
27" iMac was purchased with Leopard (or Tiger) and was upgraded to Snow Leopard. Upgraded to Lion (10.7.2) recently. I wanted to go back to use Quicken 2007 by installing a copy of Leopard on an external Firewire drive. However, my Lion-equipped iMac will not boot from the Leopard DVD.
So far everything I can find says the 27" iMac came with Snow Leopard and not Leopard or Tiger.
That could be the reason it fails to boot from Leopard DVD.
Allan
This 27" iMac was purchased a couple of years ago. "System Information" reports iMac 27-inch, Late 2009.
I concur with Allan's assessment. Mine, which I got in Mar '10 came with 10.6.2. BTW, in my original response, I erroneously typed SL when it should have been SL or Leopard.
See http://support.apple.com/kb/SP576 and http://www.everymac.com/systems/apple/imac/stats/imac-core-i5-2.66-27-inch-alumi num-late-2009-specs.htmlfor clarification. AFAICT, there wasn't an i7 version.
I can't boot from a Leopard DVD while using Lion (10.7.2)
