I have a MacBook Pro (5,1) with 4GB of memory running 10A432 – but it's running the 32-bit kernel.
Any ideas why it wouldn't be running in 64-bit mode, and how I can get it to do so?
64-bitkernelmacmacososx-snow-leopard
I have a MacBook Pro (5,1) with 4GB of memory running 10A432 – but it's running the 32-bit kernel.
Any ideas why it wouldn't be running in 64-bit mode, and how I can get it to do so?
Best Answer
In Jon Siracusa's Review of Snow Leopard he discusses the 64-bit transition.
The short version is: because there's no 'mixed-mode' a 64-bit kernel requires 64-bit Kernel Extensions and Drivers.
As those aren't widely available yet, Apple chose to default to 32-bit to avoid breaking lots of things.
Instructions from the article: