Re: Mac OS X Snow Leopard and 64-bit applications
Re: Mac OS X Snow Leopard and 64-bit applications
- Subject: Re: Mac OS X Snow Leopard and 64-bit applications
- From: Tim Seufert <email@hidden>
- Date: Sat, 29 Aug 2009 01:03:53 -0700
On Aug 28, 2009, at 11:54 PM, Eli Bach wrote:
The only 32 vs 64 bit craziness from Apple would be the artificial
limitation they put in to make it non-trivial to boot using the 64
bit kernel if your computer happens to have 32-bit EFI firmware
(this is separate from whether your machine will by default boot
using the 32 vs the 64 bit kernel).
FYI, from some forum discussions I've been reading, it's not EFI32 vs.
EFI64. Some EFI64 Macs can't boot the 64-bit kernel either.
Given that the 64b kernel is only enabled by default on XServe, it
appears that Apple is deliberately soft-launching the 64b kernel.
This is an eminently sensible thing given that 3rd party suppliers of
KEXTs need time to catch up before Apple flips the switch and makes
all but the earliest Intel Macs boot the 64b kernel. The flip side of
that coin is that with such a plan, Apple need not make sure every 64b
Mac can boot the 64b kernel on day 1. Given the eternal scarcity of
engineering resources and the high demand crunch time puts on same, I
suspect that's all that is going on here.
(Once SL's installed, time to go spelunking in /System/Library/
Extensions to see if all KEXTs are fat binaries...)
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