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From: Lao Ming on 4 Feb 2010 01:36
I looked in System Profiler but there was no obvious way to determine
this. Someone suggested 'uname -a' -- I tried it -- it didn't reveal
anything on a 2006 Xserve or a 2008 iMac. Of course, I suppose I
could find this and still be uncertain due to the distinction of being
"fully" 64-bit. So where is it and how do we know whether it's
"fully" or not-so-fully? :)

Thanks a bunch,
Lao-Ming
From: nospam on 4 Feb 2010 01:39
In article
<259781b6-d978-4a7a-b58a-8a3b57f20fc2(a)k36g2000prb.googlegroups.com>,
Lao Ming <laomingliu(a)gmail.com> wrote:

> I looked in System Profiler but there was no obvious way to determine
> this. Someone suggested 'uname -a' -- I tried it -- it didn't reveal
> anything on a 2006 Xserve or a 2008 iMac. Of course, I suppose I
> could find this and still be uncertain due to the distinction of being
> "fully" 64-bit. So where is it and how do we know whether it's
> "fully" or not-so-fully? :)

if it's a core 2 duo mac, it's 64 bit. the imac definitely is, but the
xserve might not be.

snow leopard has a 64 bit kernel but that doesn't make much of a
difference for just about everyone. it really only matters if you have
more than 32 gigs of memory and no shipping mac supports that yet.

everything else is 64 bit and has been for years.
From: Malcolm on 4 Feb 2010 02:30
On 2010-02-04 01:36:12 -0500, Lao Ming said:

> I looked in System Profiler but there was no obvious way to determine
> this. Someone suggested 'uname -a' -- I tried it -- it didn't reveal
> anything on a 2006 Xserve or a 2008 iMac. Of course, I suppose I
> could find this and still be uncertain due to the distinction of being
> "fully" 64-bit. So where is it and how do we know whether it's
> "fully" or not-so-fully? :)
>
> Thanks a bunch,
> Lao-Ming

If it's "fully" 64-bit then it can be run in 64-bit kernel mode by
holding the 6 and 4 keys while booting.
To see if it's in 64-kernel mode, click "Software" in the left column
of System Profiler (Utilities folder).
"64-bit Kernel and Extensions:" will show "Yes" or "No"
From: Tom Stiller on 4 Feb 2010 06:59
In article <030220102239537120%nospam(a)nospam.invalid>,
nospam <nospam(a)nospam.invalid> wrote:

> In article
> <259781b6-d978-4a7a-b58a-8a3b57f20fc2(a)k36g2000prb.googlegroups.com>,
> Lao Ming <laomingliu(a)gmail.com> wrote:
>
> > I looked in System Profiler but there was no obvious way to determine
> > this. Someone suggested 'uname -a' -- I tried it -- it didn't reveal
> > anything on a 2006 Xserve or a 2008 iMac. Of course, I suppose I
> > could find this and still be uncertain due to the distinction of being
> > "fully" 64-bit. So where is it and how do we know whether it's
> > "fully" or not-so-fully? :)
>
> if it's a core 2 duo mac, it's 64 bit. the imac definitely is, but the
> xserve might not be.

True but that doesn't mean it will boot Snow Leopard in 64 bit mode. I
know because my 24" iMac is such a machine and it will *not* boot in 64
bit mode.
>
> snow leopard has a 64 bit kernel but that doesn't make much of a
> difference for just about everyone. it really only matters if you have
> more than 32 gigs of memory and no shipping mac supports that yet.
>
> everything else is 64 bit and has been for years.

The 64 bit kernel can be determined by running System Profiler and
looking for the BSDKernel entry.

--
Tom Stiller

PGP fingerprint = 5108 DDB2 9761 EDE5 E7E3 7BDA 71ED 6496 99C0 C7CF
From: nospam on 4 Feb 2010 07:14
In article <tom_stiller-0EEA42.06590204022010(a)news.individual.net>, Tom
Stiller <tom_stiller(a)yahoo.com> wrote:

> True but that doesn't mean it will boot Snow Leopard in 64 bit mode. I
> know because my 24" iMac is such a machine and it will *not* boot in 64
> bit mode.

as i said, that really only matters to people who need more than 32
gigs of memory (which no current mac supports anyway).

the rest of the system is 64 bit.
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