Robert Kaiser wrote:
Rufus schrieb:
Robert Kaiser wrote:
Rufus schrieb:
That was my real point, as far as testing requirements go - there are
*lots* of Intel Macs out there that will be running 10.6.x in 32 bit
mode by default, and/or because they can't boot in 64 bit mode.
All Intels that have ever been shipped by Apple were Core2 or later,
IIRC, and therefore 64bit-capable. If they don't run 64bit on them,
that's their problem, I don't want to care too much what the masters of
the golden cage dictate their users to do. ;-)
Robert Kaiser
No. That is not true. Not even according to Apple -
http://support.apple.com/kb/ht3696
None of the single core or Core Duo Intel Macs are 64 bit capable, but
they will still run OS 10.6.
Interesting, as AFAIK all Core architecture chips support EM64T - could
be that it's only Core2 though and Apple shipped some of the older
"crap" that was called "Core" but wasn't actually a new architecture at
all (and I know for sure that Core2 has EM64T).
Robert Kaiser
The Core Solos were Apple's initial foray into the Intel world...lots of
those machines are still out there, running SnoLep.
There seems to be more to it than just the processor itself - EFI
firmware (which I suppose is similar to the PC hardware BIOS, dunno) is
the one component I know about...but even my Core 2 Duo iMac running
10.6.7 can't be booted into 64 bit mode - the EFI won't let it. It is
"hardware capable" but unsupported.
Supposedly I could hack the EFI on my Core 2 Duo iMac to make it to boot
into 64 bit mode, but I run the risk of bricking my machine...not
something I'll even consider not knowing all of the tech and risk involved.
My guess would be that some other portion of the mother board
architecture might get in the way - like memory addressing
scheme/pipeline, bus architecture, or something else hardware related
that isn't part of the CPU die itself. But that's just a guess...
--
- Rufus
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