On Jul 2, 2011, at 2:48 PM, Tina K. wrote:
Thank you for that tidbit of information, I was Intel-less until
just this year so my knowledge regarding the Intel transition is
limited.
Here's the deal:
Tiger 10.4 - Two separate versions: one pure PPC System, one pure
Intel System. Some of the software is "universal" (meaning contains
both PPC & Intel code which will work on both architectures, but is
also much larger <bloated> in size).
Leopard 10.5 - One single universal System only under which all
software runs on both PPC & Intel Macs. 32-bit only. This is the
transitional System from PPC architecture to Intel architecture. A
Leopard 10.5 HD with GUID partition format can boot both PPC & Intel
Macs manufactured prior to Snow Leopard 10.6 release. Normally PPC
Macs use Apple partition format HDs, while Intel Macs use GUID
partition format HDs. GUID HDs can boot on both PPC & Intel Macs under
Leopard 10.5, but normally a PPC HD would be Apple partition format.
Snow Leopard 10.6 - Intel-only hybrid kernel that works with either 32-
bit or 64-bit applications. This is the transitional System from 32-
bit applications to 64-bit applications.
Lion 10.7 - Intel-only 64-bit-only architecture.
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