Snow Leopard and 64 bit

Take with a grain of salt, but the 64 bit kernel for Snow Leopard doesn’t boot by default on most consumer Macs at least in the developer pre-releases.  That could change for the public release of course.  Further, the 64 bit kernel won’t boot at all on Macs running an 32 bit EFI without a little Hackintosh trickery.  The article is worth a read, but remember the caveats.

Snow Leopard Seeds Use 32bit Kernel, Drivers by Default

So far, it’s not yet known if Apple will enable owners of machines with 32bit EFI to boot into a 64bit kernel in Snow Leopard-final; Apple might offer an EFI update, or remove the artificial limitation. The same applies to MacBooks; it might be that Apple is planning on using 64bit as a selling point to drive people to buy MacBook Pros instead of ordinary MacBooks.

You can check your machine’s EFI by running the following command in the terminal:

       ioreg -l -p IODeviceTree | grep firmware-abi

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Published in: on August 19, 2009 at 5:31 pm  Comments (4)  

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4 CommentsLeave a comment

  1. Nice post. I learn something new and challenging on blogs I stumbleupon everyday.
    It’s always interesting to read articles from other authors and use a little something from their websites.

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    Snow Leopard and 64 bit | Scotsman on a Horse

  4. Right away I am going to do my breakfast, later than having my breakfast coming again to read other news.


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