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Need to ask a question about my MacBook White

It's Early 2009 model (

My question is, will it support: 1. Snow Leopard with 64-bit 2. Windows 7 with 64-bit


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Your Mac uses a “Core 2 Duo” processor (see  > About This Mac); it will support 64-bit apps (the Mac OS X kernel usually runs in 32-bit mode on most Macs, but you can still run 64-bit applications on it). There were only a few models of Intel Macs that do not support 64-bit mode. You can identify them based on their “Core Duo” or “Core Solo” processors (most of the non-“late 2006” MacBook, iMac, and Mac mini models). is nice for reviewing old specs. – Chris Johnsen Mar 19 '11 at 5:53
up vote 2 down vote accepted

With Snow Leopard, you never really say if you want 64bit or not.

With Windows, yes, according to this Apple KB, your laptop supports 64bit Windows

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I have this Macbook model (…) it's early 2009 one, and I check link that you gave (, it does not mention my model. Can you explain me how you reached to conclusion that my model will support 64 bit Windows? Thanks for the help – I-M-JM Mar 20 '11 at 5:47
The Core 2 Duo is a 64 bit processor. You can also see on here they list you can run windows 64 bit (…). Lastly, does your machine have 4GB or more RAM installed? If not, I don't even think you would see a difference between 32 and 64 bit OS's. – jmlumpkin Mar 21 '11 at 12:29
thank you for reply :) – I-M-JM Mar 22 '11 at 4:19

This model has a 64-bit CPU, and thus can run programs in 64-bit mode in both Leopard and Snow Leopard (note that MacOS doesn't have an overall 32/64-bit switch, it just runs each program in the best mode available). It will not support booting Snow Leopard's kernel in 64-bit mode (see Apple's KB article #HT3770), but the kernel mode is not particularly important.

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