Is my early 2006 iMac 32-bit or 64-bit?

I ask because Mactracker says that it's 32-bit, so does that mean that Snow Leopard would be a waste of time? I thought the whole point was that it's 64-bit, but if it runs in 32-bit mode only then I can't see the performance increase being anything to talk about.

MacBook Core 2 Duo 2GB RAM 2.4GHz and iMac 17inch 2GB RAM 1.83GHz, Mac OS X (10.5.8), iMac is on Tiger 10.4.11, MacBook is on Leopard 10.5.8

Posted on Oct 4, 2009 11:14 AM

Reply
56 replies

Oct 4, 2009 6:59 PM in response to William Lloyd

William Lloyd wrote:
Snow Leopard boots a 32-bit kernel on all machines. Period.


I see. You are in a small minority if that is what you believe. A small minority could be right of course. So, if I hold down 6-4 when I boot, then I am going to boot into 32-bit mode, right? That's quite a revelation if so. Show me where Apple or some credible publication says so.

Oct 4, 2009 7:14 PM in response to William Lloyd

William Lloyd wrote:
You can see if you are running 64 bit applications by launching Activity Monitor. 64 bit applications get the "benefits" of 64 bit and you are getting the advantages of 64-bit.

Personally, I would rather see that I am running the 64-bit kernel, after starting up holding 6-4 down and looking at About this Mac > More Info > Highlight software. When I proceed as indicated, my machine shows: "64-bit Kernel and Extensions: Yes." Otherwise it says "64-bit Kernel and Extensions: No."

Note, again, that no versions of Mac OS X boot with a 64 bit kernel. Only Mac OS X Server on the latest two models of Xserve boot the 64 bit kernel by default.


No one is talking about "default." We all know, and the discussion assumes, that the boot into the 64-bit kernel is made by holding down 6-4 when starting up a machine, for example, like mine. See sig. And, there are other ways for us to boot into the 64-bit kernel.

Oct 5, 2009 12:25 AM in response to donv_the_ghost

donv (The Ghost) wrote:
Nevermind. I didn't recognize the thread from page 2. What happened? 🙂


Please understand that there are several different ways to view topics in Discussions. This means some of us see every thread in one page, or in a different number of pages from other users; & in flat, threaded, or tree view. Thus, references to "page 2" or to posts "above" or "below" others doesn't mean much.

Oct 5, 2009 8:20 AM in response to donv_the_ghost

1. I don't particularly want to change the way I'm viewing Discussions threads. I've developed workflows that suit the view options I use. (That's why Discussions offers more than one view option.)

2. I have no idea what way you view them, so I still would have no idea what you mean when you reference something like "page 2" or "the post above this one" in your posts.

The point I'm trying to make is that this kind of view-specific reference will always be indeterminate & confusing, & is best avoided when a reference to a specific post or set of posts is needed.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Is my early 2006 iMac 32-bit or 64-bit?

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.